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!

sulfur dioxide

explanation: acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. these substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.