NGC 1569
Encyclopedia : N : NG : NGC : NGC 1569
| Galaxy | List of galaxies |
|---|---|
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! style="text-align:left;" | Apparent magnitude (V)
| 11.86
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! style="text-align:left;" | Apparent dimensions (V)
| 3.6 × 1.8 arcmin
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! style="text-align:left;" | Constellation
| Camelopardalis
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! colspan="2" style="background-color: #30D5C8; text-align: center;" | Physical characteristics
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! style="text-align:left;" | Radius
| 3,800 ly
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! style="text-align:left;" | Absolute magnitude (V)
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! style="text-align:left;" | Notable features
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! colspan="2" style="text-align:left;" | Other designations
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| colspan="2" |
|} NGC 1569 is an irregular galaxy and dwarf galaxy in Camelopardalis that was discovered by William Herschel on November 4, 1788. While this faint galaxy is not a popular amateur astronomy target, it is well studied by professional astronomers, who are interested in the history of star formation within the galaxy. NGC 1569 contains two super star clusters with different histories. Both clusters have experienced episodic star formation. Super star cluster A, located in the northwest of the galaxy, contains young stars (including Wolf-Rayet stars) that formed less than 5 million years ago as well as older red stars. Super star cluster B, located near the center of the galaxy, contains an older stellar population of red giants and red supergiants. Both of these star clusters are thought to have masses equivalent to the masses of the globular clusters in the Milky Way. Numerous smaller star clusters with relatively young ages have also been identified . These results, along with the results from other dwarf galaxies such as the Large Magellanic Cloud and NGC 1705, demonstrate that star formation in dwarf galaxies does not occur continuously but instead occurs in a series of short, nearly instantaneous bursts. Notes and references
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