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25 Cards in this Set
- Front
- Back
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Spectrum |
A range of colors |
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Apparent magnitude |
How bright a light looks |
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Absolute magnitude |
The actual brightness of a star |
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Light year |
The distance that light travels In one year. |
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Parallax |
The apparent shift in a stars location |
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H-R diagram |
A graph showing the relationship between a stars temp. and it's absolute magnitude |
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Main sequence |
The diagonal patten of stars on a H-R diagram |
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White dwarf |
Small hot stars that are the leftover centers from larger old stars |
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Red giant |
A star that has grown very large |
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Supernova |
The death of a large star by an explosion |
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Neutron star |
Forms when the particles inside a star turn to neutrons |
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Pulsar |
A spinning neutron star |
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Black hole |
When a supernova collapses |
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Galaxies |
Large round groups of stars |
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Spiral galaxies |
galaxies in the shape of a spiral |
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Elliptical galaxies |
have very bright centers and very little dust and gas |
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Irregular galaxies |
galaxies that don't fit into any other class |
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nebulas |
giant clouds of gas and dust |
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Globular clusters |
groups of older stars |
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Open clusters |
groups of stars that are located along a spiral disc of a galaxy |
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quasars |
galaxies in the process of forming |
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cosmology |
study of the origin and the future of the universe |
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big bang theory |
states that the universe began with a big explosion |
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cosmic background radiation |
radiation left over in space |
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The |
It |
