click below
click below
Normal Size Small Size show me how
unit 2 lesson 1-2
Vocabb terms
| Term | Definition |
|---|---|
| Solar system | The sun and all of the planets and other bodies that travel aronund it |
| Galaxy | A collection of stars, dust and gas bound together by gravity |
| Planet | A relatively large star sherpicaral that orbits star |
| Light year | The distance that light travels in one year about 9.46 trillion kilometers |
| Star | A large celestial body that is composed of ans that emits light; The sun is a typical star |
| Universe | Space and all the matter and energy in it |
| Luminosity | The actual brightness of an object such as a star |
| Apperent magnitudee | The brightness of the strs as seen form earth |
| Absoulute magnitude | any method of measuring of how a bright star would be if it were seen form the standard distance |