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15 Cards in this Set
- Front
- Back
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aurora
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a display of changing colored light high in the atmosphere
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azimuth
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a measurement of direction, expressed as an angle and measured clockwise from a celestial reference point
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corona
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the faint halo-like outer portion of the sun's atmosphere
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cosmogony
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the study of the ultimate origins of physical systems
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facula
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a small, bright spot on the sun's surface
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nadir
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the point on the celestial sphere directly below the observer
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nebula
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an irregular, diffuse interstellar cloud
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occultation
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passage of one celestial object in front of another
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penumbra
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the region of semi-shadow in an eclipse; the less dark outer region of a sunspot
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perturbation
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disturbance in regular motion (usually orbiting) of a celestial body
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pulsar
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a collapsed star of extremely high density
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sidereal
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having to do with the stars
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syzygy
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straight alignment of three celestial bodies
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umbra
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the region of total shadow in an eclipse; the dark center of a sunspot
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zenith
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the point on the celestial sphere directly overhead
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