Which phrases describe an irregular galaxy? Check all that apply.

1. There are different forms if we're talking about galaxies, for example, spiral, lenticular, or elliptical shape, but an irregular galaxy doesn't have any form.

2. There are two types of irregular galaxies, type one and type two.

Type one

These galaxies are with a low lightness and are generally dwarfs.

Type two

These galaxies are young and are produced by a fusion of galaxies.

3. These irregular galaxies are composed of gas and dust, and About 15% of the galaxies are irregular.