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On sait depuis longtemps que les étoiles sont des astres semblables au Soleil ; mais ce n'est qu'en 1810 que l'on a vu qu'elles sont faites de gaz incandescent. À partir de 1860, on a déterminé progressivement la composition chimique de ce gaz. Vers 1940, on a enfin compris que l'énergie des étoiles était thermonucléaire, et su comment elles la rayonnaient. Quant à leur évolution, elle a fait depuis cette époque l'objet d'une quête progressive que l'on peut considérer comme à peu près terminée. Enfin, ce n'est que tout récemment que l'on a commencé à comprendre comment les étoiles se forment à partir de la matière interstellaire et comment a lieu la mort violente des étoiles massives. Les étoiles doubles serrées sont le siège de phénomènes extraordinaires que l'on n'a pas fini d'explorer. Le présent ouvrage fait le point sur tous ces aspects, tandis que l'impact de l'évolution des étoiles sur celle des galaxies est également abordé. Les observations les plus intéressantes sont rappelées, illustrées par des images souvent spectaculaires, tandis que la théorie est expliquée de façon simple, sans cependant éviter quelques développements mathématiques et physiques lorsqu'ils sont indispensables à une compréhension réelle des phénomènes. Ainsi, sans être un traité pour spécialistes, ce livre sera lu avec profit par les personnes qui possèdent des bases scientifiques du niveau de la licence, et qui veulent s'initier en profondeur au monde fascinant des étoiles.
Stars --- Stellar evolution --- Evolution --- Compact objects (Astronomy) --- Evolution.
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Guiding the reader through all the stages that lead to the formation of a star such as our Sun, this advanced textbook provides students with a complete overview of star formation. It examines the underlying physical processes that govern the evolution from a molecular cloud core to a main-sequence star, and focuses on the formation of solar-mass stars. Each chapter combines theory and observation, helping readers to connect with and understand the theory behind star formation. Beginning with an explanation of the interstellar medium and molecular clouds as sites of star formation, subsequent chapters address the building of typical stars and the formation of high-mass stars, concluding with a discussion of the by-products and consequences of star formation. This is a unique, self-contained text with sufficient background information for self-study, and is ideal for students and professional researchers alike.
Stars --- Etoiles --- Formation. --- Formation --- Science --- Astrophysics & Space Science --- Astrophysics & Space Science. --- Stellar evolution --- Evolution --- Compact objects (Astronomy) --- Birth, Stellar --- Formation, Star --- Formation, Stellar --- Stellar birth --- Stellar formation --- Evolution.
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What is a black hole? How many of them are in our Universe? Can black holes be created in a laboratory or in particle colliders? Can objects similar to black holes be used for space and time travel? This text discusses these and many other questions providing the reader with the tools required to explore the Black Hole Land independently.
Black holes (Astronomy) --- Gravitational collapse. --- Stars --- Stellar evolution --- Evolution --- Compact objects (Astronomy) --- Collapse, Gravitational --- Frozen stars --- Gravitational collapse --- Evolution. --- 524.8 --- 524.8 The Universe. Metagalaxy. Cosmology --- The Universe. Metagalaxy. Cosmology --- Black holes (Astronomy). --- Science --- Astrophysics & Space Science. --- Cosmology.
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Circumstellar disks are vast expanses of dust that form around new stars in the earliest stages of their birth. Predicted by astronomers as early as the eighteenth century, they weren't observed until the late twentieth century, when interstellar imaging technology enabled us to see nascent stars hundreds of light years away. Since then, circumstellar disks have become an area of intense study among astrophysicists, largely because they are thought to be the forerunners of planetary systems like our own-the possible birthplaces of planets. This volume brings
Disks (Astrophysics) --- Stars --- Birth, Stellar --- Formation, Star --- Formation, Stellar --- Stellar birth --- Stellar formation --- Astrophysical discs --- Astrophysical disks --- Discs (Astrophysics) --- Disk systems (Astrophysics) --- Astrophysics --- Formation. --- Evolution --- Disques (Astrophysique) --- Etoiles --- Formation --- new stars, dust, circumstellar disks, space, astronomy, solar system, universe, birth of a star, astrophysics, technology, interstellar, planetary systems, planets, stellar evolution, radiation, magnetohydrodynamics, hydrodynamics, gases, chemical processes, chemistry, physics, science, nonfiction, formation, protoplanetary structure, magnetic fields, dispersal, mineralogy, accretion.
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