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