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19 Cards in this Set
- Front
- Back
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Star
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a large celestrial body that is composed of gas and that emits light
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Doppler Effect
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an observed change in the frequency of a wave when the source or observer is moving
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Light year
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the distance that light travels in one year
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parallax
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an apparent shift in the position of an object when viewed from different locations
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apparent magnitude
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the brightness of a star as seen from earth
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main sequence
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the location on the H-R diagram where most stars lie
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nebula
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a large cloud of gas and dust in interstellar space
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giant
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a very large and bright star whose hot core has used most of its hydrogen
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white dwarf
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a small, hot, dim star this the leftover center of an old star
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nova
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a star that suddenly becomes brighter
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neutron star
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a star that has collapsed under gravity
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pulsar
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a rapidly spinning neutron star that emits pulses of radio and optical energy.
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black hole
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an object so massive and dense that even light cannot escape its gravity
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constellation
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one of 88 regions into which the sky has been divided in order to describe the location of celestrial objects
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galaxy
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a collection of stats, dust, and gas bounf together by gravity
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quasar
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quasi-stellar radio source
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cosmology
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the study of orgin, properties, processes and evolution of the unvierse
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cosmic background radiation
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radiation uniformly detected from every direction in space
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Is dad mentally disabled?
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yes, but we just refer to him as a Dumb A$$.
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