The Universe
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Created by:
dcmarshall2015 on May 7, 2012
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15 terms
Terms | Definitions |
|---|---|
 Milky Way | earth is part of this galaxy |
| apparent magnitude | how bright a star seems from earth |
| sprial, elliptical, and irregular | three basic types of galaxies |
| HR (Herzsprung-Russell) diagram | a chart that sorts stars by their luminosity and temprature |
| absolute magnitude | how much light is actually given off from a star |
| universe | everything--all the stars, galaxies, etc. |
| radio waves | the longest wavelength |
| gamma rays | the shortest wavelength |
| spectroscope | device that splits the light from the stars into visible light |
| hydrogen and helium | two main gases in all stars |
| light year | the distance a ray of light can travel in one year |
| bluish white | color of the hottest stars |
| red | color of the coolest stars |
| black holes | area of extreme gravity that results from a supernova |
| a supernova | the brightest thing in the universe |
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