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galaxies
Question | Answer |
---|---|
how are galaxies classified? | by their shape (spiral, elliptical, irregular) |
what type of galaxy do we live in? | spiral galaxy - milky way |
how many light years is the universe? | 46 billion light years and 13.8 billion years old |
what is a galaxy? (at least 100 billion galaxies in the universe) | a huge system of millions or billions of stars, together with gas and dust, held together by gravity |
our solar system is located where in the galaxy? | the Orian Arm |
the center of the galaxy contains what? | a black hole |
which galaxy is random and scattered | irregular |
which galaxy is flat and disk shaped | spiral |
which galaxy is smooth and circular | elliptical |
what does a black hole contain | gas, dust, stars |