Brainlies theres 2 questions 1. which of the following best describes an irregular galaxy? a group of stars that serve as a quick reference to different parts of the sky several billion stars arranged in a shape that has uneven edges billions of planets arranged in an irregular pattern with a flattened core millions of stars arranged in the shape of a disk with spiraling arms

I am not sure about the second one, but I know the first one.

The answer is D.

"An irregular galaxy is a galaxy that does not have a distinct regular shape, unlike a spiral or an elliptical galaxy. Irregular galaxies do not fall into any of the regular classes of the Hubble sequence, and they are often chaotic in appearance, with neither a nuclear bulge nor any trace of spiral arm structure."

Q1: B Several billion stars arranged in a shape that has uneven edges

Q2: PSRQ

Explanation:

Q1: B is correct because there aren't billions of planets in a galaxy, A is not right because that is the definition of a constellation, and D describes an elliptical galaxy.

Q2: the apparent magnitude is the distance from Earth.

Hope this helped!

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds