Comet 21P/Giacobini-Zinner came closer to Earth this week than it had in 72 years. Favorite photos here, from the EarthSky community. Plus info on comet Wirtanen, which might become visible to the eye alone later this year.
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Mars is closest to the sun today1 hour ago
Mars is closest to the sun today
1st quarter moon is September 165 hours ago
1st quarter moon is September 16