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30 Cards in this Set
- Front
- Back
Brightness of a star as it would appear if located 32.6
light-years from the Earth. |
Absolute Magnitude
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Brightness of a star as it appears from the Earth.
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Apparent Magnitude
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Type of spiral galaxy with a bar of stars that runs through
its center. |
Barred Spiral Galaxy
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Pair of stars that revolve around each other.
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Binary Star
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Hole in space with a gravity so great that not even light can escape,
formed by the collapse of a very large supernova. |
Black Hole
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Describing any star that is always visible in the night sky and,
from the Northern Hemisphere, can be seen circling Polaris. |
Circumpolar
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Pattern of stars.
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Constellation
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Type of galaxy with a very bright center that contains little dust
and gas and is spherical to disklike in shape. |
Elliptical Galaxy
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Large-scale group of stars.
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Galaxy
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Very large, cool, bright star.
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Giant
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Spherically shaped group of hundreds of stars located around
the core of the Milky Way Galaxy. |
Globular Cluster
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Hertzsprung-Russell diagram; graph showing the relationship of
the surface temperature and absolute magnitude of a star. |
H-R diagram
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Type of galaxy with no identifiable shape and an uneven
distribution of stars within it. |
Irregular Galaxy
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Distance that light travels in one year, about 9.5 trillion km.
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Light-year
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Star with characteristics that place it within a band running
through the middle of the H-R diagram. |
Main-Sequence Star
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Dark cloud of gas and dust in space; first stage in the development of a
star. |
Nebula
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Collapsed core of a supernova consisting of a small, extremely
dense ball of neutrons. |
Neutron Star
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White dwarf star that explodes as it cools, temporarily becoming thousands
of times brighter. |
Nova
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Loosely shaped group of hundreds of stars.
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Open Cluster
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Method of determining the distance from the Earth to a star based on
the shift in the apparent position of the star when viewed from different angles. |
Parallax
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Expanding shell of gases shed by a dying star.
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Planetary Nebula
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Inside a nebula, the shrinking, spinning center region; the second
stage in the development of a star. |
Protostar
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Neutron star that emits two beams of radiation that sweep across
space. |
Pulsar
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Starlike object that gives off radio waves and X rays.
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Quasar
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Apparent lengthening of the light waves emitted by a star moving away
from the Earth. |
Red Shift
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Type of galaxy with a nucleus of bright stars and flattened arms
that swirl around the nucleus. |
Spiral Galaxy
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Body of gases that gives off a tremendous amount of radiant energy in the
form of light and heat. |
Star
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Extremely large, giant star.
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Supergiant
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Star that blows apart with a tremendous explosion.
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Supernova
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Small, hot, dim star.
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White Dwarf
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