Andrew Planck

Astronomer, Teacher, Musician

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William Herschel

Multi-Ring Basin on the Moon – Mare Nectaris

Multi-Ring Basin on the Moon – Mare Nectaris

The week of August 28 – September 3 takes us from Day 13 to Day 20. This week we will highlight Mare Nectaris on the moon, which is viewable Sunday night in the SE quadrant of Lunar Map at L13.

Andrew Planck August 28, 2023August 25, 2023 Dates to Observe Objects on the Moon, Lunar Days in August, Multi-ring basin on the moon No Comments Read more

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

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

The week of April 17-April 23 takes us from Day 27 to Day 4. This week we will highlight the craters Peirce & Picard, located in the western portion of Mare Crisium and viewable on Sunday evening. Peirce & Picard:

Andrew Planck April 17, 2023April 13, 2023 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in April, Wrinkle Ridge on the moon No Comments Read more

Moon Crater Proclus: One of the Brightest Spots on the Moon

Moon Crater Proclus: One of the Brightest Spots on the Moon

The week of January 9 to January 15 takes us from Lunar Day 17 to Day 22. This week we will highlight the moon crater Proclus, near Mare Crisium. Proclus: [NE/H14; L=47°E] Proclus is a small moon crater located just

Andrew Planck January 9, 2023January 4, 2023 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in January 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)
  • Moon Crater Aristoteles, Close to the Terminator - November 10, 2025
  • Complex Moon Crater Pythagoras - November 3, 2025
  • Theophilus, Cyrillus, Catharina Moon Craters West of Mare Nectaris - October 27, 2025
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