Question

What are galaxies? Why is it important to study them?

Answer 1

Answer:

I don't have another answer, just adding this so they can get brainliest. Thank you for the answer and have a good day :)

Explanation:

Answer 2

Answer:

Galaxies are sprawling systems of dust, gas, dark matter, and anywhere from a million to a trillion stars that are held unitedly by gravity. Nearly all large galaxies are believed to also contain supermassive black holes at their centers. In our galaxy, the Milky Way, the sun is just one of about 100 to 400 billion stars that spin around Sagittarius A, a supermassive black hole that holds as much mass as four million suns. Some of the galaxies receding from the Milky Way are ellipsoidal, like footballs. Galaxies can also be thin and flat with tentacle-like arms.