Question

Which of the following is true concerning the motions of stars in spiral galaxies: stars in the bulge have nearly circular orbits, stars in the disk have nearly circular orbits stars in the bulge have nearly circular orbits, stars in the disk have random orbits stars in the bulge have random orbits, stars in the disk have nearly circular orbits stars in the bulge have random orbits, stars in the disk have random orbits

Answer 1

1.)answer is 1-stars in the bulge have nearly circular orbits and disk have nearly circular orbits

2.)collisions betwwen stars rarely occur while between gases frequently occur

3.) False-Gravity compresses lighter elements together, creating the heat and pressure that make fusion possible; however, by itself, gravity isn't an energy source

4.)False-galaxy contaisn asteroids other than stars and gas etc