Stars and Galaxies

Front

How many stars are in our Solar System?

Back

1

Front

What is a galaxy?

Back

A galaxy is a system of stars, dust, and gas bound together by gravity.

Front

What is the escape velocity of black holes?

Back

The escape velocity of black holes is greater than the speed of light.

Front

What is nuclear fusion?

Back

Nuclear fusion is the process where atoms fuse together and create energy.

Front

When is a star born?

Back

A star is born when nuclear fusion starts.

Front

What is a nebula?

Back

A nebula is a giant cloud of dust and gas in space, often the birthplace of stars.

Front

What is the main component of stars?

Back

The main component of stars is hydrogen.

Front

What happens to a star when it exhausts its hydrogen fuel?

Back

When a star exhausts its hydrogen fuel, it can expand into a red giant or undergo a supernova.

Front

What is a black hole?

Back

A black hole is a region in space where the gravitational pull is so strong that nothing, not even light, can escape.

Front

What is the Milky Way?

Back

The Milky Way is the galaxy that contains our Solar System.