Andrew Planck

Astronomer, Teacher, Musician

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catena – crater chain

Humboldt: Moon Crater with Cluster of Central Peaks

Humboldt: Moon Crater with Cluster of Central Peaks

The week of December 1-7 takes us from Day 12 to Day 18. This week we will highlight the moon crater Humboldt, visible on Thursday night close to the terminator. Humboldt: [SE/M18; L=81°E] This moon crater is best viewed when

Andrew Planck December 1, 2025November 24, 2025 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in November, Moon craters No Comments Read more

Moon Crater Humboldt – Best Viewed with Pronounced Libration

Moon Crater Humboldt – Best Viewed with Pronounced Libration

The week of September 22-28 takes us from Day 1 to Day 7. This week we will highlight the moon crater Humboldt, visible on Tuesday night close to the eastern edge. Humboldt1: [SE/M18] This moon crater is best viewed when

Andrew Planck September 22, 2025September 17, 2025 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in September 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)
  • Bailly – Largest Crater on Our Side of the Moon - January 12, 2026
  • Longomontanus: Exception to the Rule About Moon Crater Age - January 5, 2026
  • Schickard: Terrain Made Up of Two Different Chemical Compositions - December 29, 2025
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