See photos of Comet 21P/Giacobini-Zinner and the naked-eye comet 46P/Wirtanen, which will swing around the sun in September and December.
Comet Double Whammy: Photos of 21P/Giacobini-Zinner and 46P/Wirtanen by Stargazers
SPACE.com - 6 Sep 2018 13:00
See photos of Comet 21P/Giacobini-Zinner and the naked-eye comet 46P/Wirtanen, which will swing around the sun in September and December.
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