Constellations

2. The type of magnitude that measures the actual brightness of a star.
3. A common star element with a very distinct red line in its spectrum.
6. A measure of a star's brightness.
10. The part of the star made of cooler gases that starlight passes through.
12. A famous blue star that is much hotter than red stars.
14. A group of stars that form a recognizable pattern.
15. The constellation where Betelgeuse and Rigel are located.
17. Stars act like hot solids because they are made of gas that is very ________.
18. One of the elements identified by its unique "fingerprint" lines.
19. The instrument used to spread strograph into its colors.

1. A famous red star that is considered relatively "cool".
4. The apparent shift in a star's position when viewed from different locations.
5. The type of motion where stars seem to move due to Earth's rotation.
7. What an astronomer can infer by looking at a star's color.
8. A rainbow of colors produced when light is spread out.
9. An element that glows orange-red when electric current flows through it.
11. Bright lines made when certain wavelengths of light are given off.
13. The distance that light travels in one year.
14. A spectrum that shows all the colors, like one from a light bulb.
16. A nickname for emission lines because they are unique to each element.