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Ch26.2StarProperties
CPE only
| Question | Answer |
|---|---|
| Light Year | Distance used to measure distance between stars and galaxies; the distance light travels in one year; equals 6 trillion miles. |
| Parallax | the apparent motion of an object against a background; a method used to determine the distance to stars; closer stars appear to move more. |
| Apparent brightness (magnitude) | How bright stars appear from Earth |
| Absolute brightness (magnitude) | How bright a star really is. |
| Why might one star appear brighter than another? | It might be bigger, closer, or hotter. |
| Spectroscope | Instrument that collects visible light to identify the gases (composition) of that star. |