Comparison of a UDG to a Spiral Galaxy (IMAGE)

W. M. Keck Observatory

Comparison of a UDG to a Spiral Galaxy

Caption

DGSAT I (left), an ultra-diffuse galaxy (UDG), is shown next to a normal spiral galaxy (right) for comparison. Both are similar in size, but UDGs like DGSAT I have so few stars, you can see right through them, to the galaxies in the background.

Credit

A. ROMANOWSKY/UCO/D. MARTINEZ-DELGADO/ARI

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