Variable nebula

Nebula with varying brightness

Variable nebulae are reflection nebulae that change in brightness because of changes in their star.

References

^ Andrews, Sean M.; Rothberg, Barry; Simon, Theodore (2004-07-20). "Mid-Infrared and Submillimeter Observations of the Illuminating Source of M c Neil's Variable Nebula". The Astrophysical Journal. 610 (1): L45–L48. arXiv:astro-ph/0406089. doi:10.1086/423031. ISSN 0004-637X. S2CID 6180841.
^ Lampland, C. O. (December 1936). "Hind's Variable Nebula". Publications of the Astronomical Society of the Pacific. 48: 318. doi:10.1086/124737. ISSN 0004-6280. S2CID 121683912.
^ Close, L. M.; Roddier, F.; Hora, J. L.; Graves, J. E.; Northcott, M.; Roddier, C.; Hoffman, W. F.; Dayal, A.; Fazio, G. G.; Deutsch, L. K. (November 1997). "Adaptive Optics Infrared Imaging Polarimetry and Optical HST Imaging of Hubble's Variable Nebula (R Monocerotis/NGC 2261): A Close Look at a Very Young Active Herbig Ae/Be star". The Astrophysical Journal. 489 (1): 210–221. doi:10.1086/304777. ISSN 0004-637X. S2CID 120197024.
^ Graham, J. A.; Phillips, A. C. (February 1987). "Rapid variability of the R Coronae Australis reflection nebula NGC 6729". Publications of the Astronomical Society of the Pacific. 99: 91. doi:10.1086/131959. ISSN 0004-6280. S2CID 120612709.

Astrobiscuit: Seeing The Speed Of Light fun and educational video about variable nebula and the amateur community observing them

Nebulae

Visible nebula

Pre-stellar nebulae