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8 Cards in this Set
- Front
- Back
Elliptical Galaxies |
A type of galaxy having an approximately ellipsoidal shape and a smooth, nearly featureless brightness profile. They are three-dimensional, without much structure, and their stars are in somewhat random orbits around the center. |
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Spiral Galaxy |
A galaxy in which the stars and gas clouds are concentrated mainly in one or more spiral arms. |
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Irregular Galaxy |
A galaxy that does not have the clearly defined shape and structure of typical elliptical, lenticular, or spiral galaxies. |
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Planetary Nebula |
A ring-shaped nebula formed by an expanding shell of gas round an ageing star. |
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Stellar Nebula |
A cloud of superheated gases and other elements formed by the explosive death of a massive star. |
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What is a solar system?? |
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Main Features of a star |
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Black Holes |
A region of space having a gravitational field so intense that no matter or radiation can escape. They have such a strong pull that not even light can escape. |
