Star Quiz

3. the galaxy that includes the solar system
6. the measure of the brightness of a star or other celestial body
9. the brightness that depends on how far a star is from the earth
12. The most abundant element in stars
13. the second most abundant element that composes the stars
15. the center of mass of two or more bodies that orbit one another
16. the force that holds the planets in orbit around the sun
18. is the brightness the star would have if all stars were the same standard distance from earth
19. they are up to 1000 times the diameter of the sun

1. an apparent change in the position of an object caused by a change in the position of the observer
2. closest star to earth after the sun
4. the study of everything in the universe beyond earth's atmosphere
5. the color of the coolest star
7. anything that has mass and occupies space
8. a group of stars that appears to form a pattern or picture
10. a device that measures the spectrum of light
11. These stars are the smallest, they has a diameter of about 16 km
14. the distance that light travels in one year at a speed of 300 000 km per second (kps)
17. The color of the hottest star