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Chapter 8 Section 4
Vocabulary Chapter 8 Section 4
| Vocabulary | Definition |
|---|---|
| binary star | a star system that contains two stars |
| eclipsing binary | a star system in which one star periodically block the light from one another |
| spiral galaxy | a galaxy whose arms curve outward in a pinwheel pattern |
| elliptical galaxy | a galaxy shaped like a flattened ball that can contain mostly old stars |
| irregular galaxy | a galaxy that does not have a regular shape |