Andrew Planck

Astronomer, Teacher, Musician

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winter solstice

Finger-Like Projections on the Moon: Mare Vaporum

Finger-Like Projections on the Moon: Mare Vaporum

The week of December 16-22 takes us from Day 19 to Day 26. This week we will highlight Mare Vaporum, viewable early Wednesday morning, and the Winter Solstice. Mare Vaporum: [NE/H10; L=4°E] Notice how there are finger-like projections extending from

Andrew Planck December 16, 2019December 15, 2019 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in December, Unusual Features on the Moon No Comments Read more

Maurolycus – Largest and Most Conspicuous #MoonCrater in the Lunar Highlands

Maurolycus – Largest and Most Conspicuous #MoonCrater in the Lunar Highlands

The week of December 18 – 24 takes us from just past New Moon to Day 6. This week we will highlight the crater Maurolycus, viewable on Sunday evening. Maurolycus: [SE/P11] Let us venture briefly into a region where angels

Andrew Planck December 18, 2017December 18, 2017 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in December, Unusual Features on the Moon No Comments Read more

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It is highly recommended that you get a copy of Sky and Telescope's Field Map of the Moon, the very finest Moon map available for use at the telescope. It is available for $10.95 at www.skyandtelescope.com and on Amazon. All features mentioned in this blog will be keyed to the grid on the Field Map and will look like this: Plato: [NW/D9]

Credits: Courtesy of Gray Photography of Corpus Christi, Texas Lunar photos: NASA / USGS / BMDO / LROC / ASU / DLR / LOLA / Moon Globe. Used by permission

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Andrew Planck
Andrew Planck
Author and Astronomer Andrew Planck shepherds you to the moon and its mysteries of intrigue and surprise. Learn about the moon’s most fascinating objects, understand how the moon was formed and the names of many of the craters … and why they honor individuals who have changed the course of history.
Andrew Planck
Latest posts by Andrew Planck (see all)
  • Sinus Iridum – The Bay of Rainbows Located in the Northwest Sector of Mare Imbrium - February 9, 2026
  • Moon Crater Endymion - February 2, 2026
  • Moon Crater Plato - January 26, 2026
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