Bubble nebula. Hubble space telescope (HST) optical image of the Bubble nebula (NGC 7635). It is partially seen at upper left. The Bubble nebula is so

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Bubble nebula. Hubble space telescope (HST) optical image of the Bubble nebula (NGC 7635). It is partially seen at upper left. The Bubble nebula is so named because it contains an almost perfectly spherical expanding shell of gas. It is an emission nebula, an enormous cloud of gas and dust in which the hydrogen gas is ionised by the radiation from a hot star (far left), causing it to glow. The star's radiation is shaping the dense region of gas at bottom right and also causing it to glow. The Bubble nebula lies 11,300 light years from Earth in the constellation Cassiopeia. Image taken on September 6 1992.

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Size: 3991px × 4417px
Photo credit: © NASA/ESA/STSCI/HUBBLE HERITAGE TEAM/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 1992, 7635, astronomy, birth, bubble, cosmology, emission, evolution, formation, hubble, image, nebul, nebula, ngc, science, star, starbirth, stellar