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chpte3astronomy901
jada mabins
| Term | Definition |
|---|---|
| Galaxy | a giant structure that contains hundrends of stars. |
| Universe | a lot of and everything in it. |
| Light-Year | The distance that light travel in one year. |
| Giant star | A star that is larger than the sun. |
| apparant magnitude | the brightness of a star. |
| absolute magnitude | the brightness of a star were a stand and distance of earth. |
| Hertzsprung- Russelll diagram | a graph relating the temparature and brightness of stars. |
| main sequence | an arzbtea on the Herstzsprung-Russell diagram that runs Upper to Left to Lower to right. |
| constellation | a pattern in the sky. |
| Visible Light | Electromagnetic radation that can be seen with Unaided eye. |
| Electromagnetic | Energy that Ravies through space. |
| Radiation: | The process in wich energy is emmitted as a paricle. |
| Wavelength | the distance between a crust another |
| Spectrum | a range of wavelengths |