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2. Great Debate (astronomy) - Wikipedia

   en.wikipedia.org/wiki/Great_Debate_(astronomy)

   Download as PDF; Printable version; In other projects Wikidata item; Appearance. ... An Introduction to Modern Astrophysics (2nd ed.). Cambridge University Press.

3. Kelvin–Helmholtz mechanism - Wikipedia

   en.wikipedia.org/wiki/Kelvin–Helmholtz_mechanism

   The Kelvin–Helmholtz mechanism is an astronomical process that occurs when the surface of a star or a planet cools. The cooling causes the internal pressure to drop, and the star or planet shrinks as a result.

4. PDF - Wikipedia

   en.wikipedia.org/wiki/PDF

   In December 2020, the second edition of PDF 2.0, ISO 32000-2:2020, was published, with clarifications, corrections, and critical updates to normative references [15] (ISO 32000-2 does not include any proprietary technologies as normative references). [16] In April 2023 the PDF Association made ISO 32000-2 available for download free of charge. [14]

5. Astrophysical fluid dynamics - Wikipedia

   en.wikipedia.org/wiki/Astrophysical_fluid_dynamics

   Astrophysical fluid dynamics is a branch of modern astronomy which deals with the motion of fluids in outer space using fluid mechanics, such as those that make up the Sun and other stars. [1] The subject covers the fundamentals of fluid mechanics using various equations , such as continuity equations , the Navier–Stokes equations , and Euler ...

6. Gravitational collapse - Wikipedia

   en.wikipedia.org/wiki/Gravitational_collapse

   Gravitational collapse of a massive star, resulting in a Type II supernova. Gravitational collapse is the contraction of an astronomical object due to the influence of its own gravity, which tends to draw matter inward toward the center of gravity. [1]

7. Timeline of cosmological theories - Wikipedia

   en.wikipedia.org/wiki/Timeline_of_cosmological...

   Modern cosmological ideas follow the development of the scientific discipline of physical cosmology. For millennia, what today is known to be the Solar System was regarded as the contents of the "whole universe", so advances in the knowledge of both mostly paralleled. Clear distinction was not made until circa mid-17th century.

8. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

9. Thin disk - Wikipedia

   en.wikipedia.org/wiki/Thin_disk

   Edge on view of the Milky Way with several structures indicated (not to scale). The Thin disk is shown in green.. The thin disk is a structural component of spiral and S0-type galaxies, composed of stars, gas and dust.