Chapter 17 A Diversity of Galaxies Courtesy of NASA, ESA, S. Beckwith (STScI) and the HUDF Team.
Galaxies The Life and Death of the Stars. A galaxy is a cluster of stars, gas, and dust that are held together by gravity. There are three main types.
Galaxies are collections of stars (between 200 billion and 400 billion) that all rotate (orbit) around a massive central point.
Black Hole - a theoretical massive object, formed at the beginning of the universe or by the gravitational collapse of a star exploding as a supernova,
The Universe… …is space and everything in it.. Galaxies A galaxy is a cluster of stars, gas, and dust that are held together by gravity. There are three.
The Universe… …is space and everything in it.
Earth Science 25.3 The Universe
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Leo
