What is cosmology?

How old is the universe?

Which theory of the universe starts with a big bang and the expansion continues?

Which theory of the universe starts with a big bang , expands, gravity pulls it back in and then a big bang happens again?

Which theory of the universe states the universe has always been here and nothing has really changed?

What is the evidence that the universe is exoanding?

The brightness of a star as seen from Earth is called the __________ magnitude.

The brightness of stars when they are compared at the same distance is called the _________ magnitude.

A galaxy whose arms curve outward in a pinwheel pattern is a

A galaxy shaped like a flattened ball that can obtain mostly old stars is

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