chapter 2 section 1 <stars>
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13 terms
Terms | Definitions |
|---|---|
 spectrum | colored band produced when beam of light passes through a prism |
| blue | warm star (color wise) |
| red and yellow | cool stars (color wise) |
| continuous spectrum | a spectrum that shows all colors |
| spectograph | to break a star's light into a spectrum. |
| emission lines | bright lines that are made when certain wavelengths of light are given off, or emitted, by hot gases |
| absorption spectrum | is produced when light from a hot solid or dense gas passes through a less dense, cooler gas |
| first magnitude | brightest stars |
| sixth magnitude | dimmer stars |
| apparent magnitude | the brightness of a star as seen from Earth |
| absolute magnitude | the brightness that a star would have at a distance of 32.6 light years from Earth |
| light year | the distance that light travels in one year; about 9.46 trillion kilometers |
| parallax | an apparent shift in the position of an object when viewed from different locations |
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