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6th science ch4 sec2
6th science ch4 sec2 Characteristics of stars
| Question | Answer |
|---|---|
| Constellation | Patterns of stars |
| spectrograph | A device that breaks light into colors and produces an image of the resulting spectrum |
| Apparent Brightness | Brightness that is seen from Earth |
| Absolute brightness | The brightness the star would have if it were a standard distance from Earth |
| light-year | The distanced that light travels in on year about 9.5 million Kilometers |
| Parallax | the apparent change in position of an object when you look at it from different places |
| H-R diagram | shows relationship between surface temp. and absolute brightness |
| Main sequence | diagram from a diagonal area, more that 90% of the stars including the sun are main sequence stars |