APOD 12/3/04

Comments and questions about the APOD on the main view screen.
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Andrew Bushmill

APOD 12/3/04

Post by Andrew Bushmill » Fri Dec 03, 2004 9:38 pm

Today's APOD of I Zwicky 18 mentions that this galaxy is only 3000 ly across. Makes me wonder: How is it different in essence from a large open cluster?
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