This is the last death gasp of a dying star. NASA's Hubble Telescope captured this telling image of U Camelopardalis (or U Cam for short), a red giant star in the Camelopardalis constellation, as it became increasingly unstable.
Camelopardalis, or U Cam, is a star nearing the end of its life. As it begins to run low on fuel, it is becoming unstable. Every few thousand years, it coughs out a nearly spherical shell of gas as a layer of helium around its core begins to fuse. The gas ejected in the star’s latest eruption is clearly visible in this picture as a faint bubble of gas surrounding the star
Preview of a Forthcoming Supernova - NASA's Hubble Telescope captured an image of Eta Carinae. This image consists of ultraviolet and visible light images from the High Resolution Channel of Hubble's Advanced Camera for Surveys. The field of view is approximately 30 arcseconds across.