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The Ghost Nebula

The Ghost Nebula

Hubble Space Telescope

IC 63 — nicknamed the Ghost Nebula — is about 550 light-years from Earth. The nebula is classified as both a reflection nebula — as it is reflecting the light of a nearby star — and as an emission nebula — as it releases hydrogen-alpha radiation. Both effects are caused by the gigantic star Gamma Cassiopeiae.

Credit
ESA/Hubble, NASA
Licence
CC BY 4.0
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