Il sito di sole librerie professionali

‎ASTRONOMIA‎

Main

Numero di risultati : 17.097 (342 pagina/e)

Prima pagina Pagina precedente 1 ... 39 40 41 [42] 43 44 45 ... 87 129 171 213 255 297 339 ... 342 Pagina successiva Ultima pagina

‎Albert EINSTEIN:‎

‎ERNST MACH. Sonderabdruck [Offprint] aus der Physikalischen Zeitschrift [17. Jahrgang. 1916. Seite 101–104]. Überreicht vom Verfasser [Presented by the author]. With 1 cliché repro of Mach's signed photo portrait.‎

‎True author's presentation offprint in the original wrappers, of Einstein's obituary for Austrian physicist and philosopher Ernst Mach. - Edition: Mach is particularly known as influential philosopher of science for his contemporaries. Through his criticism of Newton's theories of space and time he for instance foreshadowed Einstein's theory of relativity. - Condition: Corners and margins of wrappers with some very small faults, cover slightly water-stained, paper minimally foxy, otherwise solid copy. - Rarity: Present copy is imprinted „Überreicht vom Verfasser“ (presented by the author) on the upper right corner of the first page, which indicates it's utmost rarity, as author's presentation offprints of Einstein papers, from any journal or any period, were printed in a small print run for the use of the author only. ABPC (1973ff.) and APO (1988ff.) show no record at all. - Reference: Collected Papers, vol. 6, 29; Schilpp-Shields 96; Weil 89.‎

‎Albert EINSTEIN:‎

‎GEDÄCHTNISREDE AUF KARL SCHWARZSCHILD. [Memorial Lecture on Karl Schwarzschild.] Sitzungsberichte der Königlich Preussischen Akademie der Wissenschaften, XXXIV (1916). Öffentliche Sitzung am 29. Juni, p. 768-769.‎

‎First separate printing in the original wrappers, of Einstein's obituary for German astronomer and physicist Karl Schwarzschild, a pioneer in astrophysics. - Edition: Schwarzschild had provided the first exact solution to the Einstein field equations of general relativity, for the limited case of a single spherical non-rotating mass, which he had accomplished in 1915, the same year that Einstein first introduced his »Theory of General Relativity«. - Condition: Wrappers minimally torn at margins, otherwise very well preserved copy indeed, uncut thus obviously not opened at all. - Rarity: ABPC (1973ff.) and APO (1988ff.) record only 1 copy of this edition at auction (2014). - Reference: Schilpp-Shields 100; Weil 87.‎

‎Albert EINSTEIN:‎

‎KRITISCHES ZU EINER VON HRN. DE SITTER GEGEBENEN LÖSUNG DER GRAVITATIONSGLEICHUNGEN. [Critical Comment on a Solution of the Gravitational Field Equations Given by Mr. De Sitter.] Sitzungsberichte der Königlich Preussischen Akademie der Wissenschaften, XII (1918). Sitzung der physikalisch-mathematischen Klasse am 7. März, p. 269-272.‎

‎First separate printing in the original printed wrappers, of Einstein's attempt to refute Willem De Sitter's wrong cosmological model. - Contents: Einstein here criticizes De Sitter's hypothesis about the structure of the cosmic gravitational field. The De Sitter model, which competes with the Einstein cosmos, was the dominant cosmological model until the 1930s. The Academy's publishing list on the rear cover also announces an offprint of this paper for Reichsmark 0,50. - Condition: Wrappers at margins minimally torn, some pages creased due to reading, otherwise well preserved indeed.- Rarity: ABPC (1973ff.) and APO (1988ff.) records only 1 copy of this edition at auction (2011). - Reference: Alicke, Einstein, 91; Boni-Russ-L. 108; Collected Papers, vol. 7, 1; Schilpp-Shields 120; Weil 98.‎

‎Albert EINSTEIN:‎

‎NEUE FORMALE DEUTUNG DER MAXWELLSCHEN FELDGLEICHUNGEN DER ELEKTRODYNAMIK. [A New Formal Interpretation of Maxwell's Field Equations of Electrodynamics.] Sitzungsbericht der Königlich Preussischen Akademie der Wissenschaften, VII. Gesamtsitzung vom 3. Februar. Sonderabdruck [Offprint]).‎

‎First offprint in the original wrappers, of this important paper by Einstein about electromagnetism. - Condition: Wrappers minimally dusty, otherwise very well preserved copy. - Rarity: According to Weil early offprints of Einstein’s papers may also be qualified as original and also highly collectable editions, however they were printed in a certain, but still small print run for commercial use (mainly to sell them to fellow natural scientists): „No doubt, the first appearance in a periodical is the „original edition“, but I have to leave it open for collectors, librarians and others to decide whether these offprints in wrappers, mostly with a printed title on them (especially in the »Sitzungsberichte der Königlich Preussischen Akademie der Wissenschaften«) are also „original editions“. These offprints are printed from the same setting as the text, but often with new pagination.“ (p. 4). Additionally to offprints like the present, some copies bearing the imprint „Überreicht vom Verfasser“ [Presented by the Author] were printed for the use of the author. ABPC (1973ff.) and APO (1988ff.) record only 2 copies of this edition at auction (2011, 1998). - Reference: Boni-Russ-L. 86; Collected Papers, vol. 6, 27; Schilpp-Shields 97; Weil 79.‎

‎Albert EINSTEIN:‎

‎NEUE MÖGLICHKEIT FÜR EINE EINHEITLICHE FELDTHEORIE VON GRAVITATION UND ELEKTRIZITÄT. [New Possibility for a Unified Field Theory of Gravity and Electricity]. Sonderabdruck [Offprint] aus den Sitzungsberichten der Preussischen Akademie der Wissenschaften, physikalisch-mathematischen Klasse, XVIII (1928).‎

‎First offprint in the original wrappers and new pagination, of Einstein's upgraded attempt toward creating a unified field theory. - Condition: Mint. - Reference: Boni-Russ-L. 171; Schilpp-Shields 218; Weil 162 (quotes the pagination of the first separate printing, p. 224-227).‎

‎Albert EINSTEIN:‎

‎RIEMANN-GEOMETRIE MIT AUFRECHTERHALTUNG DES BEGRIFFES DES FERNPARALLELISMUS. [Riemannian Geometry with Preservation of the Concept of Distant Parallelism]. Sonderabdruck [Offprint] aus den Sitzungsberichten der Preussischen Akademie der Wissenschaften, physikalisch-mathematischen Klasse, XVII (1928).‎

‎First offprint in the original wrappers, of Einstein's application of the Elliptic geometry by German mathematician Bernhard Riemann. - Contents: In this mathematical apparatus developed from Riemann's address, Einstein found the frame to fit his physicals ideas, his cosmology, and cosmogeny; and the spirit of Riemann's address, was just what physics needed: the metric structure determined by physical data'. -cf. DSB XI, 447-456 (Riemann). - Condition: Mint. - Reference: Boni-Russ-L. 171; Schilpp-Shields 212; Weil 161 (differs in pagination, p. 217-221).‎

‎Albert EINSTEIN:‎

‎SCHALLAUSBREITUNG IN TEILWEISE DISSOZIIERTEN GASEN. [Propagation of Sound in Partly Dissociated Gases.] Sitzungsberichte der Preussischen Akademie der Wissenschaften, XVIII (1920). Sitzung der physikalisch-mathematischen Klasse vom 8. April. Sonderabdruck [Offprint]).‎

‎First offprint in the original wrappers, of Einstein's paper on the subject of intermolecular forces. - Edition: In this work Einstein calculated the rate of chemical reactions in a gas by means of observations on the propagation of sound (see Mason, »Physical Acoustics«, p. 13), an important contribution to modern acoustics. - Condition: Very fine indeed. - Rarity: According to Weil early offprints of Einstein’s papers may also be qualified as original and also highly collectable editions, however they were printed in a certain, but still small print run for commercial use (mainly to sell them to fellow natural scientists): „No doubt, the first appearance in a periodical is the „original edition“, but I have to leave it open for collectors, librarians and others to decide whether these offprints in wrappers, mostly with a printed title on them (especially in the »Sitzungsberichte der Königlich Preussischen Akademie der Wissenschaften«) are also „original editions“. These offprints are printed from the same setting as the text, but often with new pagination.“ (p. 4). Additionally to offprints like the present, some copies bearing the imprint „Überreicht vom Verfasser“ [Presented by the Author]. ABPC (1973ff.) and APO (1988ff.) record only 1 copy of this edition at auction (2011). - Reference: Boni-Russ-L. 119; Collected Papers, vol. 7, 39; Schilpp-Shields 135; Weil 110.‎

‎Albert EINSTEIN:‎

‎SPIELEN GRAVITATIONSFELDER IM AUFBAU DER MATERIELLEN ELEMENTARTEILCHEN EINE WESENTLICHE ROLLE? [Do Gravitational Fields Play an Essential Role in the Structure of the Elementary Particles of Matter?] Sitzungsberichte der Preussischen Akademie der Wissenschaften, XX (1919). Gesamtsitzung vom 10. April. Sonderabdruck [Offprint]).‎

‎First offprint in the original wrappers, of Einstein's important follow-up paper on the field equations in his General Theory of Relativity. - Contents: In present paper Einstein suggests a modification of his field equations to allow for stable elementary particles. According to Pais this text "may be considered Einstein's first attempt at a unified field theory"” (Pais, Subtle is the Lord, p. 287). - Condition: Cover at margins minimally dusty, otherwise very fine indeed, probably unread. - Rarity: According to Weil early offprints of Einstein’s papers may also be qualified as original and also highly collectable editions, however they were printed in a certain, but still small print run for commercial use (mainly to sell them to fellow natural scientists): „No doubt, the first appearance in a periodical is the „original edition“, but I have to leave it open for collectors, librarians and others to decide whether these offprints in wrappers, mostly with a printed title on them (especially in the »Sitzungsberichte der Königlich Preussischen Akademie der Wissenschaften«) are also „original editions“. These offprints are printed from the same setting as the text, but often with new pagination.“ (p. 4). Additionally to offprints like the present, some copies bearing the imprint „Überreicht vom Verfasser“ [Presented by the Author] ABPC (1973ff.) and JAP/APO (1950ff.) record only 1 copy of this edition at auction (2011). - Reference: Boni-Russ-L. 111; Collected Papers, vol. 7, 17; Schilpp 123; Weil 106.‎

‎Albert EINSTEIN:‎

‎THEORIE DER LICHTFORTPFLANZUNG IN DISPERGIERENDEN MEDIEN. [Theory of the Propagation of Light in Dispersive Media.] Sitzungsberichte der Preussischen Akademie der Wissenschaften, III (1922). Sitzung der physikalisch-mathematischen Klasse vom 2. Februar. Sonderabdruck [Offprint]).‎

‎First offprint in the original wrappers, of Einstein's paper on photons. - Condition: Front cover with some very small spots, otherwise very fine. - Rarity: ABPC (1973ff.) and APO (1988ff.) record only 2 copies of this edition at auction (2009, 1994). - Reference: Schilpp-Shields 162; Weil 120.‎

‎Albert EINSTEIN:‎

‎ZU KALUZAS THEORIE DES ZUSAMMENHANGES VON GRAVITATION UND ELEKTRIZITÄT. [Kalzuza's Theory on the Connection between Gravity and Electricity.] Erste Mitteilung. Zweite Mitteilung. [2 parts.] Sitzungsberichte der Preussischen Akademie der Wissenschaften, VI (1927). Sitzung der physikalisch-mathematischen Klasse vom 17 Februar. Sonderabdruck [Offprint]).‎

‎First offprint in the original wrappers, of Einstein's paper on the important findings of German mathematician and physicist Theodor Kaluza about gravitation and electricity. - Content: Kaluza "attempted to unify Einstein's theory of gravity with Maxwell's theory of light by mixing them in a fifth dimension". Together with the Swedish theoretical physicist Oskar Klein Kaluza produced the „Kaluza-Klein field equations" (Calaprice, Einstein Almanac, 135). Their insights, however, were "neglected for many years as attention was directed towards quantum mechanics. [Their] idea that fundamental forces can be explained by additional dimensions did not re-emerge until string theory was developed" (Wikipedia). - Condition: Mint. - Reference: Boni-Russ-L. 170; Schilpp-Shields 212; Weil 156.‎

‎Albert EINSTEIN:‎

‎ZUR AFFINEN FELDTHEORIE. [On Affine Field Theory.] Sitzungsberichte der Preussischen Akademie der Wissenschaften, XVII (1923). Sitzung der physikalisch-mathematischen Klasse vom 31. Mai. Sonderabdruck [Offprint]).‎

‎First offprint in the original wrappers, of this first attempt of Einstein to formulate a unified field theory. - Content: In this important paper Einstein gives his first investigation of "Affine geometries" and introduces the notion of "Distant parallelism", thus for the first time attempting to formulate a unified field theory based on the research of the German mathematician, theoretical physicist and philosopher Hermann Weyl. - Condition: Mint. - Reference: Alicke 113; Norman Library 698; Schilpp-Shields 175; Weil *132.‎

‎Albert EINSTEIN:‎

‎ZUR ALLGEMEINEN RELATIVITÄTSTHEORIE. On the General Theory of Relativity. Sitzungsberichte der Preussischen Akademie der Wissenschaften, V (1923). Sitzung der physikalisch-mathematischen Klasse vom 15. Februar. Sonderabdruck [Offprint]).‎

‎First offprint, in the original wrappers. - Content: In this paper Einstein accepted that his introduction of the 'cosmological constant' in 1917, in order to allow for the possibility of a static universe, may have been a mistake. - Condition: Very fine. - Rarity: ABPC (1973ff.) and APO (1988ff.) record 4 copies of this edition at auction (2012 (2x), 2011, 1994). - Reference: Boni-Russ-L. 140; Schilpp-Shields 174; Weill 131.‎

‎Albert EINSTEIN:‎

‎ZUR EINHEITLICHEN FELDTHEORIE. [On The Unified Field Theory]. Sonderabdruck [Offprint] aus den Sitzungsberichten der Preussischen Akademie der Wissenschaften, physikalisch-mathematischen Klasse, I (1929).‎

‎First offprint in the original wrappers, of this important paper by Einstein formulating groundbreaking developments towards a unified field theory. - Content: »On The Unified Field Theory« is one of Einstein's last scientific core works. According to Weil "This paper represents a new development which was immediate news. A translation by L.L.Whyte appeared in the (London) Times of Feb. 4, 1929. It was quoted in full in "Observatory", vol. 52, under the title "New Field Theory" pp.82-87 and (1930) pp.11-118." In 1928 Einstein embarked on a new approach to a unified field theory, involving what he called „distant parallelism“. By early 1929 he had solved the main problems involved in writing down field equations for his unified field theory. On the day of offical publication of the third of a formidably technical series of 9 articles on the theory, excited headlines appeared in newspapers around the world. - cf. Parkinson, Breakthroughs, p.279. - Condition, State: Mint, uncut, thus unread. - The list of academy offprints on the rear side of the cover states present offprint not in last place. All offprints listed later were printed in 1929 though. The typeset of all pages is identical to other authentified offprints of this papers. This indicates that our copy is indeed a first offprint, but presumably with a later cover. - Reference: Alicke 141; Boni-Russ-L. 183; Norman Collection I, 700; Printing and the Mind of Man 416 („Principal Work“); Schilpp-Shields 226; Weil *165.‎

‎Albert EINSTEIN; Jakob GROMMER [pt. 1]:‎

‎ALLGEMEINE RELATIVITÄTSTHEORIE UND BEWEGUNGSGESETZ. [General Theory of Relativity and the Law of Motion.] 2 issues. Sitzungsberichte der Preussischen Akademie der Wissenschaften, I (1927). Gesamtsitzung vom 6. Januar. AND: Sitzungsberichte der Preussischen Akademie der Wissenschaften, XXXII (1927). Sitzung der physikalisch-mathematischen Klasse vom 8. Dezember. Mitteilung vom 24. November. 2 Sonderabdrucke [2 Offprints]).‎

‎First offprints in the original wrappers, of two of Einstein's papers about the interrelations of the General Theory of Relativity and the Law of Motion, the 2nd paper conducted with his assistant Jakob Grommer. - Condition: Mint. - Reference: Boni-Russ-L. 171; Schilpp-Shields 212; Weil 155 and 160.‎

‎Albert EINSTEIN; Walther MAYER:‎

‎EINHEITLICHE THEORIE VON GRAVITATION UND ELEKTRIZITÄT. [Unified Theory of Gravity and Electricity.] Sonderausgabe [Offprint] aus den Sitzungsberichten der Preussischen Akademie der Wissenschaften, physikalisch-mathematischen Klasse, XXV (1931). AND: EINHEITLICHE THEORIE VON GRAVITATION UND ELEKTRIZITÄT. [Unified Theory of Gravity and Electricity.] Zweite Abhandlung [2nd Treatise]. Sonderausgabe [Offprint] aus den Sitzungsberichten der Preussischen Akademie der Wissenschaften, physikalisch-mathematischen Klasse, XII (1932).‎

‎First offprints in the original wrappers and new pagination, of this important two-part paper by Einstein formulating new developments towards Unified Field Theories. - Content: Einstein made several attempts at a five-dimensional unified field theory, including this two-part collaboration with Austrian mathematician Walther Mayer (nicknamed „Einstein's calculator“), "in which a new unified field theory was proposed, one based on a four-dimensional space-time continuum with a five-dimensional tangent space attached at each point" (Pais, Subtle is the Lord, p. 492). - Condition: Very well preserved. - Reference: Boni-Russ-L. 207; Printing and the Mind of Man 416 („Principal Work“); Schilpp-Shields 251 and 261; Weil *182 and *185 (quotes the paginations of the first separate printings, p. 541-557 and 130-137).‎

‎Albert EINSTEIN; Walther MAYER:‎

‎SEMI-VEKTOREN UND SPINOREN. [Semi-Vectors and Spinors]. Sonderausgabe [Offprint] aus den Sitzungsberichten der Preussischen Akademie der Wissenschaften, physikalisch-mathematischen Klasse, XXXII (1932).‎

‎First offprint in the original wrappers and new pagination, of this rare seminal paper, at the same time Einstein's last publication before having to leave Nazi-Germany. - Content: Present paper ist the last work by Einstein, co-authored once again by Walther Mayer, that was published in Weimar Germany (Weil no. 187 was printed before). The offprint was distributed by the Prussian exactly a week before the Nazis came to power on January 30th 1933. Einstein, and also Mayer, would have to flee Germany due to their Jewish origins only a few months later. - Einstein's work on semivectors "was stimulated by Ehrenfest's insistence on a better understanding of the relation between single-valued and double-valued representations of the Lorentz group . . . [Einstein and Mayer] went on to relate semivectors to the Dirac equation and to generalize the formalism to general relativity" (Pais, Subtle is the Lord, pp. 451-452). - Condition: Mint. - Reference: Alicke 152; Boni-Russ-L. 217; Schilpp-Shields 250; Weil 186 (quotes the pagination of the first separate printing, p. 522-550).‎

‎Albert EINSTEIN; Walther MAYER:‎

‎SYSTEMATISCHE UNTERSUCHUNG ÜBER KOMPATIBLE FELDGLEICHUNGEN, WELCHE IN EINEM RIEMANNSCHEN RAUME MIT FERNPARALLELISMUS GESETZT WERDEN KÖNNEN. [Systematic Investigation of Consistent Field Equations That Can Be Posited in a Riemannian Space with Distant Parallelism]. Sonderausgabe [Offprint] aus den Sitzungsberichten der Preussischen Akademie der Wissenschaften, physikalisch-mathematischen Klasse, XIII (1931).‎

‎First offprint in the original wrappers and new pagination, of this late paper by Einstein about field equations in a Riemannian Space. - Content: This work was written in collaboration with his assistant, the Austrian mathematician Walther Mayer (nicknamed „Einstein's calculator“). In 1928 Einstein already had made use of the Elliptic geometry of German mathematician Bernhard Riemann for his calculations. - Condition: Mint. - Reference: Alicke 149; Schilpp-Shields 250; Weil 180 (quotes the pagination of the first separate printing, p. 257-265).‎

‎Albert EINSTEIN; Walther MAYER:‎

‎ZWEI STRENGE STATISCHE LÖSUNGEN DER FELDGLEICHUNGEN DER EINHEITLICHEN FELDTHEORIE. [Two Strictly Static Solutions of the Field Equations of the Unified Field Theory]. Sonderausgabe [Offprint] aus den Sitzungsberichten der Preussischen Akademie der Wissenschaften, physikalisch-mathematischen Klasse, VI (1930).‎

‎First offprint in the original wrappers and new pagination, of this late paper by Einstein about the Unified Field Theory, written in collaboration with his assistant, the Austrian mathematician Walther Mayer (nicknamed „Einstein's calculator“). - Condition: Mint. - Reference: Alicke 144; Boni-Russ-L. 196; Schilpp-Shields 240; Weil 170 (quotes the pagination of the first separate printing, p. 110-120).‎

‎ALBERT JACQUARD‎

‎La légende de la vie.‎

‎FLAMMARION . 1992 In-4 relié. 287 pages. Jaquette effrangée. Très bon état d’occasion.‎

‎Très bon état d’occasion‎

Riferimento per il libraio : 78418

Livre Rare Book

Librairie de l'Avenue
Saint-Ouen France Francia França France
[Books from Librairie de l'Avenue]

€ 25,00 Informazioni/Compera

‎Albert Nodon‎

‎Éléments d'astrophysique. Introduction à l'étude de l'énergétique solaire et stellaire‎

‎L'étude de l'énergétique solaire et stellaire est une branche de l'astrophysique qui se concentre sur la compréhension de la production et de la libération d'énergie par les étoiles, y compris notre propre étoile, le Soleil. Cette discipline joue un rôle essentiel dans la compréhension de la structure interne des étoiles, de leur évolution, de leur cycle de vie et de leur influence sur l'univers. Voici quelques concepts clés abordés dans l'étude de l'énergétique solaire et stellaire : Fusion nucléaire : Les étoiles, y compris le Soleil, génèrent de l'énergie par fusion nucléaire, un processus par lequel les noyaux légers d'hydrogène fusionnent pour former des noyaux plus lourds, libérant ainsi une quantité considérable d'énergie. Structure stellaire : Les astrophysiciens étudient la structure interne des étoiles pour comprendre comment la chaleur et l'énergie sont générées dans leur noyau, puis transportées à travers différentes couches jusqu'à leur surface. Diagrammes de Hertzsprung-Russell : Ces diagrammes sont des outils graphiques importants utilisés pour classer et comparer les étoiles en fonction de leur luminosité, de leur température et d'autres propriétés. Ils aident à révéler les différentes étapes de l'évolution stellaire. Cycle de vie des étoiles : Les étoiles passent par différentes phases au cours de leur évolution, de la naissance à la mort. Les astrophysiciens étudient ces phases pour comprendre comment les étoiles naissent, brillent et finissent par s'éteindre. Énergie solaire : L'étude de l'énergie solaire se concentre sur notre étoile, le Soleil. Les chercheurs analysent la production d'énergie solaire, son rayonnement, son impact sur la Terre (par exemple, le climat) et les méthodes pour utiliser cette énergie sur Terre (solaire photovoltaïque, énergie solaire thermique, etc.). Étoiles variables : Certaines étoiles montrent des variations de luminosité au fil du temps. L'étude de ces étoiles variables peut fournir des informations précieuses sur leur structure interne et leur comportement. Supernovae : Les supernovae sont des explosions d'étoiles en fin de vie. Elles libèrent une quantité phénoménale d'énergie et produisent de nouveaux éléments chimiques. L'étude des supernovae est essentielle pour comprendre l'enrichissement chimique de l'univers. L'astrophysique stellaire et solaire est une discipline complexe qui requiert une compréhension approfondie de la physique nucléaire, de la thermodynamique, de la mécanique des fluides et d'autres domaines de la physique pour expliquer les phénomènes observés dans les étoiles. Elle est cruciale pour notre compréhension de l'univers et de notre place en son sein. volume relié demi cuir, grand in8, 220x140, très bon état, 242pp. Couverture d'origine conservée. Paris, Librairie Scientifique Albert Blanchart, 1926 ref/8‎

Riferimento per il libraio : CZC-8467

Livre Rare Book

Livres anciens & Autographes
Lille France Francia França France
[Books from Livres anciens & Autographes]

€ 70,00 Informazioni/Compera

‎Albert Nodon‎

‎Éléments d'astrophysique. Introduction à l'étude de l'énergétique solaire et stellaire‎

‎L'étude de l'énergétique solaire et stellaire est une branche de l'astrophysique qui se concentre sur la compréhension de la production et de la libération d'énergie par les étoiles, y compris notre propre étoile, le Soleil. Cette discipline joue un rôle essentiel dans la compréhension de la structure interne des étoiles, de leur évolution, de leur cycle de vie et de leur influence sur l'univers. Voici quelques concepts clés abordés dans l'étude de l'énergétique solaire et stellaire : Fusion nucléaire : Les étoiles, y compris le Soleil, génèrent de l'énergie par fusion nucléaire, un processus par lequel les noyaux légers d'hydrogène fusionnent pour former des noyaux plus lourds, libérant ainsi une quantité considérable d'énergie. Structure stellaire : Les astrophysiciens étudient la structure interne des étoiles pour comprendre comment la chaleur et l'énergie sont générées dans leur noyau, puis transportées à travers différentes couches jusqu'à leur surface. Diagrammes de Hertzsprung-Russell : Ces diagrammes sont des outils graphiques importants utilisés pour classer et comparer les étoiles en fonction de leur luminosité, de leur température et d'autres propriétés. Ils aident à révéler les différentes étapes de l'évolution stellaire. Cycle de vie des étoiles : Les étoiles passent par différentes phases au cours de leur évolution, de la naissance à la mort. Les astrophysiciens étudient ces phases pour comprendre comment les étoiles naissent, brillent et finissent par s'éteindre. Énergie solaire : L'étude de l'énergie solaire se concentre sur notre étoile, le Soleil. Les chercheurs analysent la production d'énergie solaire, son rayonnement, son impact sur la Terre (par exemple, le climat) et les méthodes pour utiliser cette énergie sur Terre (solaire photovoltaïque, énergie solaire thermique, etc.). Étoiles variables : Certaines étoiles montrent des variations de luminosité au fil du temps. L'étude de ces étoiles variables peut fournir des informations précieuses sur leur structure interne et leur comportement. Supernovae : Les supernovae sont des explosions d'étoiles en fin de vie. Elles libèrent une quantité phénoménale d'énergie et produisent de nouveaux éléments chimiques. L'étude des supernovae est essentielle pour comprendre l'enrichissement chimique de l'univers. L'astrophysique stellaire et solaire est une discipline complexe qui requiert une compréhension approfondie de la physique nucléaire, de la thermodynamique, de la mécanique des fluides et d'autres domaines de la physique pour expliquer les phénomènes observés dans les étoiles. Elle est cruciale pour notre compréhension de l'univers et de notre place en son sein. volume relié demi cuir, grand in8, 220x140, très bon état, 242pp. Couverture d'origine conservée. Paris, Librairie Scientifique Albert Blanchart, 1926 ref/8‎

Riferimento per il libraio : CZC-8467

Livre Rare Book

Livres anciens & Autographes
La Madeleine France Francia França France
[Books from Livres anciens & Autographes]

€ 70,00 Informazioni/Compera

‎ALBERT-LEVY‎

‎Causeries.‎

‎Couverture rigide. Reliure de l'éditeur. 236 pages.‎

‎Livre. Avec 63 gravures. Librairie Hachette (Collection : Bibliothèque des écoles et des familles), 1898.‎

Riferimento per il libraio : 36513

Livre Rare Book

Librairie et Cætera
Belin-Beliet France Francia França France
[Books from Librairie et Cætera]

€ 14,40 Informazioni/Compera

‎ALBERT-MONTEMONT‎

‎Lettres sur l'astronomie‎

‎1838 Paris, A. Aubrée, s.d. ( vers 1838) 2 vol. in-8,demi chagrin noir, 548pp + 574pp., deux planches. mouillures en bas de pages tome 2 sans atteinte au texte‎

Riferimento per il libraio : 62

Livre Rare Book

Librairie Chanut
Paris France Francia França France
[Books from Librairie Chanut]

€ 45,00 Informazioni/Compera

‎Albert-Montémont‎

‎Lettres sur l'astronomie en prose et en vers - TOME PREMIER‎

‎Lelong 1823 in12. 1823. Relié.‎

‎bonne tenue de la reliure couverture défraîchie rousseurs asse clair à l'intérieur‎

Riferimento per il libraio : 100065416

Livre Rare Book

Un Autre Monde
Val Couoesnon France Francia França France
[Books from Un Autre Monde]

€ 27,00 Informazioni/Compera

‎Alberti-Poja Aldo‎

‎Lo spettacolo meraviglioso del cielo invernale con qualche nozione di astronomia per il popolo‎

‎25 cm, brossura illustrata; pp. 40, una tavola e 8 figure nel testo‎

‎Alberto Abrami‎

‎Letteratura sulla Polodia Preceduta da un esposto storico esplicativo del problema e seguita da una Tavola f. t. con due grafici‎

‎Fascicolo spillato, volume n. 253 della collezione curata dall'Osservatorio Astronomico di Trieste, le carte, imbrunite dal tempo, ma comunque in buone condizioni sono marcate dalla presenza di rarissime annotazioni e tratti a matita, copertina morbida monocolore, ingiallita e ombrata da veli di polvere, piccola firma di appartenenza a penna al piatto. N. pag. 68 USATO‎

‎ALBERTO MASANI‎

‎LE FRONTIERE DELL'UNIVERSO‎

‎<br/>Collana NUOVI QUADERNI 5<br/>Legatura brossura con bandelle<br/>Formato Ottavo<br/>Num Pagine 175<br/>Illustrazioni in b/n fuori testo<br/>Prima Edizione‎

MareMagnum

Il Mondo Nuovo
Settimo Torinese, IT
[Books from Il Mondo Nuovo]

€ 9,00 Informazioni/Compera

‎Albertum‎

‎"Le planetarium, guide explicatif; éléments de cosmographie."‎

‎Bruxelles, Editions de l'Albertum, s.d. (ca 1960). . 15 x 22, 32 pp., 16 figures, broché, bon état.‎

‎4e édition.‎

Riferimento per il libraio : 100.801

Livre Rare Book

Librairie Ausone
Bruxelles Belgium Bélgica Bélgica Belgique
[Books from Librairie Ausone]

€ 10,00 Informazioni/Compera

‎Albertum‎

‎"Le planetarium, guide explicatif; éléments de cosmographie."‎

‎Bruxelles, Editions de l'Albertum, s.d. (ca 1960). . 15 x 22, 32 pp., 16 figures, broché, bon état.‎

‎2e édition.‎

Riferimento per il libraio : 100.802

Livre Rare Book

Librairie Ausone
Bruxelles Belgium Bélgica Bélgica Belgique
[Books from Librairie Ausone]

€ 10,00 Informazioni/Compera

‎ALBERTUS DE BRUDZEWO (& BIRKENMAJER Ludovicus Antonius, ed.)‎

‎Commentariolum super theoricas novas planetarum Georgii Purbachii in studio generali cracoviensi per mag. Albertum de Brudzewo diligenter corrogatum A.D. MCCCCLXXXII‎

‎lxi + 170 pp., with some figures in text, "Post editionem principem mediolanensem A. MCCCCXCV ad fidem codicum praes. antissimorum denuo edendum curavit L.A. Birkenmajer", 24cm., text in Latin, original softcover, pages still uncut, in the series "Munera Saecularia Universitatis Cracovensis" vol.IV, good condition, rare, W100954‎

‎ALBERTUS DE BRUDZEWO (& BIRKENMAJER Ludovicus Antonius, ed.)‎

‎Commentariolum super theoricas novas planetarum Georgii Purbachii in studio generali cracoviensi per mag. Albertum de Brudzewo diligenter corrogatum A.D. MCCCCLXXXII‎

‎Cracoviae [Krakow], Typ. Universitatis Jagellonicae 1900 lxi + 170 pp., with some figures in text, "Post editionem principem mediolanensem A. MCCCCXCV ad fidem codicum praes. antissimorum denuo edendum curavit L.A. Birkenmajer", 24cm., text in Latin, original softcover, pages still uncut, in the series "Munera Saecularia Universitatis Cracovensis" vol.IV, good condition, rare, W100954‎

Riferimento per il libraio : W100954

‎ALBINI Giacinto‎

‎Gli azimut del sole per ogni grado di declinazione e di latitudine fra i paralleli 61° Nord e 61° Sud calcolati di dieci in dieci minuti pubblicati per cura dell'Ufficio Idrografico della Reggia Marina.‎

‎4°, con una carta delle variazioni magnetiche; leg. coeva mz. pelle.‎

‎ALBINI Giacinto -‎

‎Metodo grafico per risolvere un triangolo sferico sulla proiezione di Mercatore. Sua applicazione pratica nella risoluzione dei problemi di astronomia nautica.‎

‎(Roma, Barbera, 1877), stralcio con copertina posticcia muta, pp. 425/445 con una tavola litografica - !! ATTENZIONE !!: Con il termine estratto (o stralcio) intendiamo riferirci ad un fascicolo contenente un articolo di rivista, sia che esso sia stato stampato a parte utilizzando la stessa composizione sia che provenga direttamente da una rivista. Le pagine sono indicate come "da/a", ad esempio: 229/231 significa che il testo è composto da tre pagine. Quando la rivista di provenienza non viene indicata é perchè ci è sconosciuta. - !! ATTENTION !!: : NOT A BOOK : “estratto” or “stralcio” means simply a few pages, original nonetheless, printed in a magazine. Pages are indicated as in "from” “to", for example: 229/231 means the text comprises three pages (229, 230 and 231). If the magazine that contained the pages is not mentioned, it is because it is unknown to us.‎

MareMagnum

Libreria Piani
Monte San Pietro, IT
[Books from Libreria Piani]

€ 16,00 Informazioni/Compera

‎Albrand, Karl-Richard‎

‎Astronomische Navigation heute (Up to date, Weiterbildung an Bord Nr. 24)‎

‎Hamburg: Sozialwerk für Seeleute e.V. (Seamen's Welfare), 1991. 71 S. ; 21 x 15 cm ; broschiert.‎

‎Neu überarbeitete Auflage 1991. Reihe "Up to date, Weiterbildung an Bord" Nr. 24. Originalbroschur, 71 Seiten. Gutes Exemplar. pwB4‎

Riferimento per il libraio : 126861

‎Albrecht, Klaus‎

‎Maltas Tempel : zwischen Religion und Astronomie ; astronomische Ausrichtungen megalithischer Tempel auf Malta und Gozo und ihre religiösen Bezüge. 2. Auflage.‎

‎Michendorf - Wilhelmshorst : Näther. 2001. 104, [20] S. : Ill., graph. Darst., Kt. 21*15 cm. OBroschur.‎

‎Einband berieben, bestossen und fleckig, Ecken leicht gestaucht. Vorderes Innengelenk angeplatzt, sonst gut. MR02 ISBN 3934858015‎

Riferimento per il libraio : 145921

Antiquariat.de

Antiquariat BehnkeBuch
United Kingdom Reino Unido Reino Unido Royaume-Uni
[Books from Antiquariat BehnkeBuch]

€ 14,50 Informazioni/Compera

‎Albrecht, Miguel A. and Daniel Egret‎

‎Databases & On-Line Data in Astronomy. In: Astrophysics and Space Science Library, Instrumentation Vol. 171.‎

‎Dordrecht et al., Kluwer, 1991. 1. ed. XIV, 273 p. Gr.-8°, original hardcover.‎

‎Shelfmark on spine, stamp on preliminary page and title, otherwise fine copy.‎

Riferimento per il libraio : 162851

Antiquariat.de

Buch & Cafe Antiquarius
Germany Alemania Alemanha Allemagne
[Books from Buch & Cafe Antiquarius]

€ 22,00 Informazioni/Compera

‎Albrecht, Rudolf, Richard N. Hook and Howard A. Bushouse‎

‎Astronomical Data Analysis Software and Systems VII. In: Astronomical Society of the Pacific Conference Series Vol. 145.‎

‎San Francisco, Astronomical Society of the Pacific, 1998. 1. ed. Numerous fig., XXXVII, 527 p. Gr.-8°, original hardcover.‎

‎Shelfmark on spine, stamp on foretitle, otherwise fine copy.‎

Riferimento per il libraio : 162835

Antiquariat.de

Buch & Cafe Antiquarius
Germany Alemania Alemanha Allemagne
[Books from Buch & Cafe Antiquarius]

€ 41,00 Informazioni/Compera

‎ALDO PORTALUPI‎

‎MISURAZIONI FISICHE NELLA TECNICA INDUSTRIALE‎

‎ALDO PORTALUPI MISURAZIONI FISICHE NELLA TECNICA INDUSTRIALE. , Feltrinelli 1972-10-01, Copertina ombrata, ingiallita e rovinata ai margini, tagli leggermente sporchi Buono (Good) . <br> <br> <br> 588<br>‎

MareMagnum

Librisaggi
Romania Rumanía Romênia Roumanie
[Books from Librisaggi]

€ 12,00 Informazioni/Compera

‎Aldo Rainaldi‎

‎Tanti miliardi di anni fa... dal Big Bang a Cro-Magnon‎

‎Oltre 13,7 miliardi di anni fa, secondo le più diffuse teorie oggi accettate, ebbe inizio la creazione e l'espansione dell'universo. Il Big Bang, la grande esplosione cosmica, devastò la materia iniziale, la grande nebulosa, spargendo sin nei confini più lontani dell'universo frammenti di materiale incandescente che, per successive aggregazioni, diedero origini a stelle e pianeti. Inutile dire come questo straordinario scenario abbia attirato da sempre l'attenzione di fisici e astronomi, incuriositi o critici, ma tutti desiderosi di esporre una propria teoria sugli avvenimenti di quei giorni. Autori: Aldo Rainaldi.‎

‎ALEC T. STEWART‎

‎IL MOTO PERPETUO‎

‎ALEC T. STEWART IL MOTO PERPETUO. , Zanichelli 1972-10-01, Copertina ombrata e leggermente rovinata ai margini Buono (Good) . <br> <br> <br> 135<br>‎

MareMagnum

Librisaggi
Romania Rumanía Romênia Roumanie
[Books from Librisaggi]

€ 10,00 Informazioni/Compera

‎ALEMBERT (Jean Le Rond dit D'ALEMBERT) -- D'ALEMBERT‎

‎Opuscules mathématiques ou mémoires sur différens sujets de géométrie, de méchanique, d'optique, d'astronomie -- EDITION ORIGINALE ---- 8 TOMES RELIES EN 4 VOLUMES IN 4 -- COMPLETE SET -- TRES BEL EXEMPLAIRE DE CET OUVRAGE EXTREMEMENT RARE COMPLET‎

‎P., David, 1761-1780, 8 TOMES reliés en 4 volumes in 4, plein veau marbré, tranches rouges, dos ornés de fers et caissons dorés, étiquettes rouges et vertes, tranches rouges (reliures de l'époque), T. 1 : 14 pp., 1fff.n.ch. (table des mémoires), 303pp., (1pp.), 7 planches dépliantes, T.2 : 2 feuillets non chiffrés (titre + table des mémoires), 328pp., 2 feuillets non chiffrés (errata + privilège), 2 planches dépliantes, T.3 : 17pp., 420pp., 1 planche dépliante, T.4 : 16pp., 380pp., 1pp., 2 planches dépliantes, (le feuillet 7-8 de l'avertissement a été relié avant le feuillet 5-6), T.5 : 20pp., 520pp., 4 planches dépliantes, T.6 : 12pp., 443pp., (1pp.), 4 planches dépliantes, (habile restauration dans la marge supérieure de la page 132), T.7 : (2), 8pp., 397pp., (1pp.), 5 planches dépliantes, T.8 : (2), 4pp., 399pp., 5 planches dépliantes, (le carton Gii (51-52) du tome 8 annoncé dans l'avis au relieur au tome 7 semble n'avoir jamais été imprimé. En effet ce carton n'existe pas aux trois exemplaires que nous avons consultés)‎

‎---- EDITION ORIGINALE ---- TRES BEL EXEMPLAIRE DE CET OUVRAGE DE D'ALEMBERT EXTREMEMENT RARE ET BIEN COMPLET DE SES 8 TOMES ---- "D'ALEMBERT'S CHIEF SCIENTIFIC OUTPUT AFTER 1760 WAS HIS OPUSCULES MATHEMATIQUES, eight volumes of which appeared from 1761 to 1780. These collections of mathematical essays were a mixed bag, ranging from theories of achromatic lenses to purely mathematical manipulations and theorems. INCLUDED WERE MANY NEW SOLUTIONS TO PROBLEMS HE HAD PREVIOUSLY ATTACKED INCLUDING A NEW PROOF OF THE LAW OF INERTIA...". (DSB I p. 115) ---- Recherches sur les vibrations des cordes sonores - Du mouvement d'un corps de figure quelconque animé par des forces quelconques - Recherches sur les oscillations d'un corps quelconque qui flotte sur un fluide - Réflexions sur les lois du mouvement des fluides - Démonstration du principe de la composition des forces - Su les Logarithmes des quantités négatives - Remarques sur quelques questions concernant l'attraction - Doutes sur différentes questions d'optique - Supplément à l'art. 174 du TRAITE DE DYNAMIQUE nouvelle édition - Réflexion sur le calcul des probabilités - Sur l'application du calcul des probabilités à l'inoculation de la petite vérole - Application de ma solution du problème des trois corps à la théorie des comètes - Réflexions sur la comète de 1682 & 1759 - Réflexions sur le problème des trois corps, avec de nouvelles tables de la lune, d'un usage très simple et très facile - Essais sur les moyens de perfectionner les verres optiques - Recherches sur les aires de rotation d'un corps de figure quelconque qui n'est animé par aucune force accélératrice - Du mouvement d'un corps de figure quelconque - Nouvelles recherches sur les verres optiques - Réflexions sur la théorie de la lune et en général sur le problème des trois corps - Nouvelles recherches sur la théorie des fluides - Nouvelles recherches sur différens points importants d'astronomie physique - Recherches sur la figure de la terre - Réflexions sur la théorie des ressorts - Nouvelles recherches sur le mouvement des fluides dans des vases - etc**8306/83060/ARB5‎

Riferimento per il libraio : 83060

Livre Rare Book

Librairie Bernard Maille
Paris France Francia França France
[Books from Librairie Bernard Maille]

€ 7.800,00 Informazioni/Compera

‎ALEMBERT Jean Le Rond d'‎

‎Oeuvres‎

‎Paris, Belin, 1821 - 1822. Dieci volumi rilegati in cinque volumi a numerazione continua. (mm. 210 x 130). Mezza tela moderna con tassello con titolo ai dorsi. pp. (4), xxviii, 576, una tabella f.t. più volte ripiegata; (4), 621, (2); (4), 742, (2); (4), 544; (4), 479(1). Opera completa di tutte le dieci parti, ognuna con proprio frontespizio, ma con la numerazione delle pagine che non si interrompe. Bruniture sparse ma ottimi esemplari. Contiene: Elemens de philosophie - sur le systeme du monde - sur la precession des equinoxes - sur l'inoculation - de la liberte de la musique - de l'abus de la critique en materie de religion - sur le calcul des probabilites - sur la cause des vents - sur le mouvement des fluides - sur le lois de l'equilibre - sur la destruction des jesuites - memoires sur Christine - Eloges - Correspndance - etc.‎

‎Alembert, Jean Le Rond d'‎

‎Recherches sur la précession des équinoxes, et sur la nutation de l'axe de la Terre dans le système newtonien.‎

‎Paris, chez David l'ainé., 1749. 4°. XXXVVV p., 2 p.n.ch., 184 p et 4 planches dépliantes. Demi-basane brune, dos lisse orné de filets et fleurons dorés, non rogné (reliure XXe).‎

‎Edition originale. "A masterly Work" DSB. Dans ce mémoire, D'Alembert étudie le problème des trois corps et les équinoxes. Ce phénomène, dont la période est de 26 000 ans, avait été constaté par Hipparque dans l?Antiquité. Newton avait compris que la cause de ce phénomène résidait dans l?action des forces de gravitation sur le corps non rigoureusement sphérique qu?est le globe terrestre. Mais c?est à d?Alembert qu?il revint de pousser les calculs et d?obtenir des résultats numériques en accord avec l?observation. "The precession of the equinoxes, a problem previously attacked by Clairaut, was very difficult. D'Alembert's method was similar to Clairaut's, but he employed more terms in his integration of the equation of motion and arrived at a solution more in accord with the observed motion of the earth." in Dictionary of Scientific Biography. - Quelques rares rousseurs. First edition. "A Masterly Work" DSB. In this thesis, D'Alembert studies the problem of the three bodies and the equinoxes. This phenomenon, whose period is 26,000 years, was found by Hipparchus in ancient times. Newton had understood that the cause of this phenomenon was the action of the forces of gravitation on the non-rigorously spherical body that is the terrestrial globe. But it is Alembert who returned to push the calculations and obtain numerical results in agreement with the observation. "The precession of the equinoxes, a problem previously attacked by Clairaut, was very difficult. D'Alembert's method was similar to Clairaut's, but he employed more terms in his integration of the equation of motion and arrived at a solution more in accord with the observed motion of the earth." in Dictionary of Scientific Biography. Some rare foxing.‎

Riferimento per il libraio : 55564BB

‎Alessandro Coletta Giangiacomo Gandolfi‎

‎Il secondo Big Bang Esplosioni cosmiche ai confini dell'Universo‎

‎Brossura tascabile fresata, lievemente curvata da compressione, buone le condizioni generali, vol. 3 della collana, comuni impronte di manipolazione e velature ombrano i toni della copertina illustrata da composizione grafica, fogli molto bene preservati, pulviscolo ai tagli. N. pag. 263. USATO‎

‎Alexander A.F.O.'D.‎

‎The planet saturn a history of observation, theory and discovery‎

‎Dover publications. 1962. In-8. Relié. Bon état, Couv. convenable, Dos satisfaisant, Intérieur frais. 473 pages.. . . . Classification Dewey : 520-Astronomie et sciences connexes‎

‎Etiquette sur coiffe en pied. Tampon bibliothèque. Texte écrit en anglais. Classification Dewey : 520-Astronomie et sciences connexes‎

Riferimento per il libraio : R260270677

‎ALEXANDER STEPHEN‎

‎FROM THE ASTRONOMICAL JOURNAL N°s 74-77‎

‎Observation of the annular eclipse of May 26, in the suburbs of Ogdensburgh, N.Y. In 4° (270 x 250 mm) relié demi jacquin, 11 pp , 1 planche HT sous serpente‎

Riferimento per il libraio : PHO-134

‎ALEXANDER, A.F. O' D.‎

‎The Planet Saturn. A History of Observation, Theory and Discovery.‎

‎N.Y., Dover Publications, (1980). Orig. printed wrappers. 474 pp. Illustrated.‎

‎ALEXANDER, A.F. O' D.‎

‎The Planet Saturn. A History of Observation, Theory and Discovery.‎

‎N.Y., Dover Publications, (1980). Orig. printed wrappers. 474 pp. Illustrated.‎

Riferimento per il libraio : 36583

Livre Rare Book

Herman H. J. Lynge & Son
Copenhagen Denmark Dinamarca Dinamarca Danemark
[Books from Herman H. J. Lynge & Son]

€ 26,86 Informazioni/Compera

‎ALEXANDRE DE VILLEDIEU, VAN WIJK W. E. (traduction et commentaires)‎

‎Le nombre d'or. Étude de chronologie technique suivie du texte de la "Massa compoti" d'Alexandre de Villedieu, avec traduction et commentaire par W. E. van Wijk‎

‎La Haye: Martinus Nijhoff, 1936 in-8, x-158 pages, illustrations et une planche dépliante. Reliure plein chagrin rouge, dos à 5 nerfs, orné de de filets et de fleurons dorés, double filet doré encadrant les plats, tête teinte en rouge, couverture conservée, très bel exemplaire. Tirage limité à 460 exemplaires. Edition originale. Ecrit du moyen-âge sur le comput ecclésiastique.‎

‎Le nombre d'or. Étude de chronologie technique suivie du texte de la "Massa compoti" d'Alexandre de Villedieu, avec traduction et commentaire par W. E. van Wijk (La Haye: Martinus Nijhoff, 1936). [M.C.: littérature du Moyen-Age, mathématiques, astronomie, calendrier ecclésiastique]‎

Riferimento per il libraio : 13981937

Livre Rare Book

Librairie - Galerie Eburnea
Abidjan Côte d'Ivoire Costa de Marfil Costa do Marfim Côte d'Ivoire
[Books from Librairie - Galerie Eburnea]

€ 45,00 Informazioni/Compera

‎Alfaro, E. J. and A. J. Delgado‎

‎The Formation of the Milky Way. IAA-IAC-University of Pisa Workshop in Granada, Spain, September 4-9, 1994.‎

‎Cambridge, University Press, 1995. 1. ed. With numerous images, XVI, 360 p. Gr.-8°, original hardcover.‎

‎Stamp on preliminary page and title, otherwise very fine copy.‎

Riferimento per il libraio : 162556

Antiquariat.de

Buch & Cafe Antiquarius
Germany Alemania Alemanha Allemagne
[Books from Buch & Cafe Antiquarius]

€ 19,00 Informazioni/Compera

Numero di risultati : 17.097 (342 pagina/e)

Prima pagina Pagina precedente 1 ... 39 40 41 [42] 43 44 45 ... 87 129 171 213 255 297 339 ... 342 Pagina successiva Ultima pagina