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Astronomer, Teacher, Musician

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Orionid meteor shower

Moon Crater Humboldt Best Viewed When Pronounced Libration

Humboldt

The week of October 20-26 takes us from Day 1 to Day 5. This week we will highlight the moon crater Humboldt, visible on Tuesday night close to the terminator. Humboldt: [SE/M18] This moon crater is best viewed when there

Andrew Planck October 20, 2025October 12, 2025 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in October No Comments Read more

Largest and Most Conspicuous Moon Crater – Maurolycus

Maurolycus moon crater

The week of October 21-27 takes us from Lunar Day 19 to Day 25. This week we will highlight the moon crater Maurolycus, visible on Tuesday night. Maurolycus: [SE/P11; L=14°E] Let us venture briefly into a region where angels fear

Andrew Planck October 21, 2024October 17, 2024 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in October, Moon craters No Comments Read more

Lunar Swirl Reiner Gamma – Flat Features That Cast No Shadows

lunar swirl Reiner Gamma on the moon

The week of October 17-23 takes us from Lunar Day 23 to Day 28. This week we will highlight Reiner Gamma and the Struve/Russel crater, visible through Saturday. The week of September 28 – October 4 takes us from Lunar

Andrew Planck October 17, 2022October 22, 2022 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in October, Lunar Swirls No Comments Read more

Floor-Fractured Moon Crater Taruntius

Taruntius Floor Fractured Moon Crater

The week of October 18-24 takes us from Day 13 to 19. This week we will highlight the floor-fractured moon crater Taruntius, visible late Saturday night, Day 18. Taruntius: [NE/J14] Located on the north shore of Fertility, Taruntius is a

Andrew Planck October 18, 2021October 17, 2021 Craters on the Moon, Dates to Observe Objects on the Moon, Floor Fractured Moon Craters, Lunar Days in October, Uncategorized No Comments Read more

The Two Largest Intact Moon Craters on Mare Crisium: Peirce and Picard

moon craters Peirce and Picard

The week of October 19-25 takes us from Lunar Day 4 to Day 10. This week we will highlight the craters Peirce and Picard, viewable starting Monday evening. Peirce & Picard: [NE/H15] The two largest intact craters on Mare Crisium

Andrew Planck October 19, 2020October 18, 2020 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in October, Meteor Shower 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)
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  • One of the Moon’s Loveliest Sights – Moon Crater Plato - March 9, 2026
  • Moon Crater Endymion Resembles Plato - March 2, 2026
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