Andrew Planck

Astronomer, Teacher, Musician

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Serenity

Sulpicius Gallus Rilles on the Moon

Sulpicius Gallus Rilles on the Moon

The week of May 22-28 takes us from Day 3 to Day 9. This week we will highlight the Sulpicius Gallus rilles on the moon, viewable on Friday evening. Sulpicius Gallus Rilles: [NE/G10-11; L=10°E] These rilles, located on the south-western

Andrew Planck May 22, 2023May 17, 2023 Lunar Days in May, Mars, Rilles on the Moon, Venus No Comments Read more

Moon Crater Dawes and Altai Scarp – Example of Result of Shock Waves

Moon Crater Dawes and Altai Scarp – Example of Result of Shock Waves

The week of April 12-18 takes us from Lunar Day 1 to Day 6. This week we will highlight the crater Dawes and the Altai Scarp, viewable on Saturday evening. Dawes1: [NE/H12] Positioned in the straits between Tranquillity and Serenity

Andrew Planck April 12, 2021April 11, 2021 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in April, Uncategorized, Unusual Features on the Moon No Comments Read more

Moon Crater Plinius: Between Tranquillity and Serenity

Moon Crater Plinius: Between Tranquillity and Serenity

The week of October 5-11 takes us from Lunar Day 18 to Day 24. This week we will highlight the crater Plinius, viewable on Monday and Tuesday evenings. Plinius: [NE/H12] Standing sentinel between Tranquillity and Serenity is the crater Plinius,

Andrew Planck October 5, 2020October 4, 2020 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in October, Rilles on the Moon 1 Comment Read more

Moon Crater Manilius and the Sulpicius Gallus Rilles

Moon Crater Manilius and the Sulpicius Gallus Rilles

The week of April 27 – May 3 takes us from Lunar Day 5 to Day 11. This week we will highlight the crater Manilius and the Sulpicius Gallus Rilles, viewable on Wednesday evening, Day 7. Sulpicius Gallus Rilles: [NE/G10-11]

Andrew Planck April 27, 2020April 27, 2020 Dates to Observe Objects on the Moon, Lunar Days in April, Rilles on the Moon No Comments Read more

Explore 3 Moon Craters and the Anniversary of Sputnik

Explore 3 Moon Craters and the Anniversary of Sputnik

The week of September 30 – October 6 to takes us from Day 2 to Day 8. This week we will highlight the craters Dawes, Moltke and Arago, viewable on Friday evening, Day 6. Dawes1: [NE/H12] Positioned in the straits

Andrew Planck September 30, 2019September 30, 2019 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in September No Comments Read more

Discover What is Between Tranquillity and Serenity on the #Moon

Discover What is Between Tranquillity and Serenity on the #Moon

The week of August 7-13 takes us from Day 15 (full Moon) to Day 21. This week we will highlight the craters Dawes and Plinius, viewable on Friday evening (we visited these craters in the June 12th blog, but they

Andrew Planck August 7, 2017August 7, 2017 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in August, Rilles 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)
  • 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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