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9 Cards in this Set
- Front
- Back
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Spectroscope |
a tool that spreads light into different wavelengths |
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Astronomical Unit: |
The average distance between Earth and Sun, about 150 million kms |
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Light-year |
the distance that light travels in one year, 300,000 km/s |
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Apparent Magnitude |
a measure of how bright an object appears from Earth |
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Luminosity |
the true brightness of an object |
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Galaxy |
a huge collection of stars |
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Dark Matter |
matter that emits no light at any wavelength |
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Big Bang Theory |
The universe began one point billion of years ago and has been expanding ever since |
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Doppler shift |
The shift to a different wavelenght |
