Answers by visitors named: -Redacted-

anon is right and i know what i'm doing CAUSE I DID THE LESSON

Spirals are huge, contain stars, dust and gas and are held by gravity. A halo is present in Spirals, They have a pinwheel shape, and have a bulge and a thin disk. They are rich in gas and dust, and both young and old stars are present. Ellipticals have a...