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List of largest nebulae

From Wikipedia, the free encyclopedia

List of largest nebulae
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Below is a list of the largest known nebulae so far discovered, ordered by actual diameter. This list is prone to change because of inconsistencies between studies, the great distances of nebulae from our stellar neighborhood, and the constant refinement of technology and engineering.

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NGC 604, one of largest nebulae (H II region) is located in the Triangulum Galaxy (viewed by the Hubble Space Telescope).
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Caveats

Nebulae have no standardized boundaries, so the measurements are subject to revision. Furthermore, scientists are still defining the features and parameters of nebulae. Because of these rapid developments and adjustments, this list may be unreliable.

Lyman alpha nebulae around quasars can have sizes between 15 kpc and 460 kpc.[1] Especially large Enormous Lyα nebula (ELAN) can have large sizes of ≳100 kpc.[2] Farina et al. 2019 table 5 has an extensive compilation of Lyman alpha nebulae around quasars.[1] For now this list contains only the largest ELANs, with sizes larger than 300 kpc.

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List

More information Image, Nebula ...
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See also

Notes

  1. distance × sin( diameter_angle ) = 1,895 ly
  2. distance × sin( diameter_angle ) = 1,520 ly
  3. Those measurements are based on an apparent diameter of 480 arcminutes (') plus an assumed distance of 1.5 kpc and the current distance of VY CMa which is about 1.17 kpc as the nebula is sometimes found to have the same distance as VY CMa.

References

Sources

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