UGC 7321 Fluorescence (IMAGE)

Durham University

UGC 7321 Fluorescence

Caption

Galaxy UGC 7321 is surrounded by hydrogen gas, and as this gas is irradiated with UV radiation, it emits a diffuse red glow through a process known as fluorescence. This image shows the light emitted by stars inside the galaxy, surrounded by a red ring that represents the fluorescent emission induced by the UV radiation.

Credit

M. Fumagalli/T. Theuns/S. Berry

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