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Saturn and Titan, its largest moon. Credit: gsfc/Flickr, CC BY 2.0

Why Titan’s ‘Long’ Dunes Could Be the Work of a Sand That Sticks

The supernova 2013fs located in a blue, star-forming area (the red point sources in the vicinity are foreground stars), which is apparently a part of one of the major arms of the spiral host NGC 7610. Caption and credit: doi:10.1038/nphys4025

Astronomers Catch Star Just Six Hours After it Goes Supernova