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O stars
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Subgiant stars
2016-11-02T18:47:41.000Z
2018-02-06T18:12:32.000Z
O subgiant stars
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Field of view
2016-11-02T13:41:33.000Z
Parallel field
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B stars
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Subgiant stars
2016-11-02T18:47:51.000Z
2018-02-06T18:08:34.000Z
B subgiant stars
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Star formation
2016-11-02T13:48:20.000Z
2020-11-04T16:42:35.183Z
A region in the interstellar medium where processes of star formation are going on or have occurred in the past.
Star forming regions
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Field of view
2016-11-02T13:41:45.000Z
2018-09-13T19:35:12.000Z
Blank fields
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Compact dwarf galaxies
2016-11-01T17:29:34.000Z
2020-10-26T20:18:37.095Z
An small irregular galaxy undergoing violent star formation activity. These objects appear blue by reason of containing clusters of hot, massive stars which ionize the surrounding interstellar gas. They are chemically unevolved since their metallicity is only 1/3 to 1/30 of the solar value.
Blue compact dwarf galaxies
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Brown dwarfs
2016-11-02T16:04:07.000Z
2020-11-04T20:58:33.239Z
A type of ultra-cool brown dwarf with an effective temperature lower than 500 K. Near infrared spectra of these objects show deep absorption bands of H_{2}O and CH_4. So far only seven brown dwarf candidates belonging to this class have been found, all Y0 subtypes. These objects are very dim, with H magnitudes 19-23. The precise definition of the Y class requires new findings in the future about these objects.
Y dwarfs
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White dwarf stars
2017-01-23T19:32:01.000Z
2020-11-04T21:17:06.121Z
A white dwarf whose spectrum shows metal lines only; no H or He.
DZ stars
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White dwarf stars
2017-01-23T19:34:10.000Z
2020-11-04T21:16:34.709Z
A white dwarf whose spectrum shows carbon features of any kind.
DQ stars
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Chemically peculiar stars
2017-01-23T20:12:14.000Z
2020-11-04T14:48:28.033Z
A main-sequence star, usually of spectral class B to F, whose spectrum shows bright emission lines superimposed on the normal absorption lines. The emission spectrum is explained by the presence of a circumstellar shell of gas surrounding the star at the equator. Shell stars are fast rotators.
Shell stars
10
0
1