That Eerie Green Comet Visible in the Night Sky Now? We Almost Sent a Probe There.
Monday, December 17, 2018 - 13:10
in Astronomy & Space
If you were lucky enough to catch a glimpse of the bright green December visitor known as Comet 46P/Wirtanen this weekend as it made its closest approach, you are just a tiny bit luckier than the Rosetta spacecraft.