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The Sculptor Galaxy (NGC 253) is an example of a disc galaxy. A galactic disc (or galactic disk) is a component of disc galaxies, such as spiral galaxies like the Milky Way and lenticular galaxies. Galactic discs consist of a stellar component (composed of most of the galaxy's stars) and a gaseous component (mostly composed of cool gas and dust).
One of the more intriguing features Microsoft will include in this fall's Windows 10 Creators Update is Timeline. As the name suggests, it's a way for you to move backwards in time and see things ...
The Sculptor Galaxy (NGC 253) is a disk galaxy. A disc galaxy (or disk galaxy) is a galaxy characterized by a galactic disc. This is a flattened circular volume of stars that are mainly orbiting the galactic core in the same plane. [1] These galaxies may or may not include a central non-disc-like region (a galactic bulge). [2]
The thick disk is a source of early kinematic and chemical evidence for a galaxy's composition and thus is regarded as a very significant component for understanding galaxy formation. With the availability of observations at larger distances away from the Sun, more recently it has become apparent that the Milky Way thick disk does not have the ...
Image of a dead disk galaxy. A dead disk galaxy is a type of galaxy that is no longer able to form new stars. These galaxies are usually massive yet compact, fast spinning disk shaped galaxies. Most of these galaxies stopped forming new stars billions of years ago when the universe was relatively young in age. [1]
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The reason is that these galaxy formation models predict a large number of mergers. If disk galaxies merge with another galaxy of comparable mass (at least 15 percent of its mass) the merger will likely destroy, or at a minimum greatly disrupt the disk, and the resulting galaxy is not expected to be a disk galaxy (see next section).
They have much higher bulge-to-disk ratios than typical spirals and do not have the canonical spiral arm structure of late-type [note 1] galaxies, yet may exhibit a central bar. [4] This bulge dominance can be seen in the axis ratio (i.e. the ratio between the observed minor and major axial of a disk galaxy) distribution of a lenticular galaxy ...