BY LETTER
Galaxy
 Image from Steve Bowers | |
| The Triangulum galaxy | |
A gravitationally bound collection of stars, dust, and gas with a mass ranging from 100 million to 10 billion times that of the sun. Types include spiral, elliptical, and irregular.
Over the span of billions of years, galaxies may collide with one another, and usually the larger galaxy absorbs the smaller one, although this is a long process which may involve significant disruption to some, or both objects. Sometimes this involves the creation of long streams of stars which can orbit the new common centre of gravity for an extended period.
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- Andromeda Galaxy
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- Galactic Directions
- Galactic Heritage Institute
- Galactic History
- Galactic Information Bank
- Galaxy Brain
- Galaxy, Irregular - Text by M. Alan Kazlev
A galaxy of amorphous or chaotic appearance, possessing large clouds of gas and dust, and both Population I and Population II stars, but no spiral arms or nucleus. They are thought to result from a collision with a larger galaxy, pulling them out of shape. Most have relatively low mass (about a hundred million to ten billion stars). About 25% of all galaxies are irregular. - Galaxy, Spiral - Text by M. Alan Kazlev
A disk-shaped galaxy with a spiral pattern of arms, typically containing 1010 or more solar masses of stars, dust, and gas. - Interstellar Econometrics
- Milky Way
- Triangulum Transmission
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Development Notes
Text by M. Alan Kazlev
Initially published on 01 November 2001.
Initially published on 01 November 2001.
