| A | B |
|---|
| binary star | member of a double star system |
| constellation | group of stars that form a pattern |
| nova | star that suddenly increases in brightness |
| nebula | massive cloud of dust and gas |
| galaxy | huge collection of stars |
| spiral galaxy | galaxy shaped like a pinwheel |
| elliptical galaxy | galaxy shaped like a sphere or disk |
| spectroscope | instrument that breaks up light into colors |
| red shift | shift toward the red end of the spectrum |
| Doppler effect | apparent change in wavelength due to movement |
