The earliest stage of a star's life is called

What color are the coolest stars?

How bright a star appears to be from planet Earth.

A supernova is

How long a star lives depends on its

Astronomers theorize that the universe began in an enormous explosion called the

Space and everything in it is the definition for

A galaxy shaped like a flattened ball or disc

A galaxy shaped like a pinwheel.

Stars that were born from the same gases at the same time and are the same distance from Earth.

An imaginary pattern of stars in the night sky is

When a neutron star is spinning it creates a

We have a black hole in the center of our galaxy.

A galaxy and the universe are the same thing.

Which galaxy type contains the oldest stars?

Galaxy type containing the most protostars.

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