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Galaxy Vocab
Term | Definition |
---|---|
Universe | all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy. |
Galaxy | A collection of stars and planets that are held together by gravity. In a galaxy, the celestial bodies rotate around a central object |
Disk shaped galaxy | all galaxy types that possess prominent disks. These include spiral galaxies and S0 galaxies |
Spiral shaped galaxy | are twisted collections of stars and gas that often have beautiful shapes and are made up of hot young stars. ... Most spiral galaxies contain a central bulge surrounded by a flat, rotating disk of stars |
Irregular shaped galaxy | the catchall name given to any galaxy that does not neatly fit into one of the categories of the Hubble classification scheme. They have no defined shape nor structure |
Elliptical shaped galaxy | a type of galaxy with an approximately ellipsoidal shape and a smooth, nearly featureless image. |
Milky Way | the galaxy that contains our Solar System, with the name describing the galaxy's appearance from Earth |
Light Year | The distance light travels in a year |
Cluster | a group of similar things or people positioned or occurring closely together |
Andromeda Galaxy | A barred spiral galaxy around 2.5 million light years from earth and is the closest major galaxy to the Milky Way. |