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programs missions science questions astro data documents what we study dark energy, dark matter black holes the big bang galaxies stars exoplanets stars stars are the most widely recognized astronomical objects, and represent the most fundamental building blocks of galaxies. the age, distribution, and composition
detonation. credit: noao, aura, nsf, and n. smith (university of arizona) as the cloud collapses, a dense, hot core forms and begins gathering dust and gas. not all of this material ends up as part of a star — the remaining dust can become planets, asteroids, or comets or may remain as dust. in some cases...
https://science.nasa.gov/astrophysics/focus-areas/how-do-stars-form-and-evolve