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((More citations needed|date=March 2022))
[[Image:Ngc2261.jpg|right|300px|thumb|A [[Hubble Space Telescope]] image of [[NGC 2261]], a classic example of a variable nebula.]]
'''Variable nebulae''' are [[reflection nebula]]e that change in brightness because of changes in their star.

==See also==
*[[McNeil's Nebula]]<ref>((Cite journal |last1=Andrews |first1=Sean M. |last2=Rothberg |first2=Barry |last3=Simon |first3=Theodore |date=2004-07-20 |title=Mid-Infrared and Submillimeter Observations of the Illuminating Source of M c Neil's Variable Nebula |url=https://iopscience.iop.org/article/10.1086/423031 |journal=The Astrophysical Journal |language=en |volume=610 |issue=1 |pages=L45–L48 |doi=10.1086/423031 |s2cid=6180841 |issn=0004-637X|arxiv=astro-ph/0406089 ))</ref>
*[[NGC 1555]] (Hind's Variable Nebula)<ref>((Cite journal |last=Lampland |first=C. O. |date=December 1936 |title=Hind's Variable Nebula |url=http://iopscience.iop.org/article/10.1086/124737 |journal=Publications of the Astronomical Society of the Pacific |language=en |volume=48 |pages=318 |doi=10.1086/124737 |s2cid=121683912 |issn=0004-6280|doi-access=free ))</ref>
*[[NGC 2261]] (Hubble's Variable Nebula)<ref>((Cite journal |last1=Close |first1=L. M. |last2=Roddier |first2=F. |last3=Hora |first3=J. L. |last4=Graves |first4=J. E. |last5=Northcott |first5=M. |last6=Roddier |first6=C. |last7=Hoffman |first7=W. F. |last8=Dayal |first8=A. |last9=Fazio |first9=G. G. |last10=Deutsch |first10=L. K. |date=November 1997 |title=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 |url=https://iopscience.iop.org/article/10.1086/304777 |journal=The Astrophysical Journal |language=en |volume=489 |issue=1 |pages=210–221 |doi=10.1086/304777 |s2cid=120197024 |issn=0004-637X|doi-access=free ))</ref> 
*[[NGC 6729]] (R Coronae Australis Nebula)<ref>((Cite journal |last1=Graham |first1=J. A. |last2=Phillips |first2=A. C. |date=February 1987 |title=Rapid variability of the R Coronae Australis reflection nebula NGC 6729 |url=http://iopscience.iop.org/article/10.1086/131959 |journal=Publications of the Astronomical Society of the Pacific |language=en |volume=99 |pages=91 |doi=10.1086/131959 |s2cid=120612709 |issn=0004-6280|doi-access=free ))</ref>

==References==
((Reflist))


==External links==
* [https://www.youtube.com/watch?v=LeiVERr2J2Q Astrobiscuit: Seeing The Speed Of Light] fun and educational video about variable nebula and the amateur community observing them


((nebula))

[[Category:Reflection nebulae|*]]
[[Category:Nebulae]]

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