A kingly crescent Saturn rests on the right of this NASA Cassini spacecraft portrait while the moon Mimas appears above the rings on the left. Mimas looks like just a speck of light here but is actually 396 kilometers, or 246 miles, across.
A kingly crescent Saturn rests on the right of this NASA Cassini spacecraft portrait while the moon Mimas appears above the rings on the left. Mimas looks like just a speck of light here but is actually 396 kilometers, or 246 miles, across.