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Definition
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an imaginary pattern of stars in the night sky
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Definition
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an instrument that separates light into colors and makes an image of the resulting spectrum
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Definition
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a diagonal area on an H-R diagram that includes more than 90% of all stars
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Term
| Hertzsprung-Russell diagram |
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Definition
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a graph relating the surface temperatures and absolute brightness of stars
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Definition
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the brightness of a star as seen from Earth
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Definition
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the brightness a star would have if it were at a standard distance from Earth
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Definition
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the apparent change in position of an object when seen from different places
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Definition
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the distance that light travels in one year
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