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| distance that light travels in year |
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| collection of gas, dust, & stars orbiting a center mass |
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hazy band of light that circles our sky;
our galaxy |
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| point on celestial equator that is directly overhead |
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| our equator line "thrown out" into space |
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| visible path of sun around the sky |
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| period of rotation or revolution of an object, relative to stars |
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| the moon's path slightly misses the sun, thus no full eclipse |
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| moon's path crosses sun completely, but moon appears smaller than sun, thus no full eclipse |
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| 2nd "layer" of sun's visibility; bright gases |
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| 3rd "layer" of sun's visibility; faint outer atmosphere |
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Definition
| when object's orbit passes through plane of another object's orbit |
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