Andrew Planck

Astronomer, Teacher, Musician

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wrinkle ridge

Doppelmayer – Crater Subsidence on the Moon

Doppelmayer – Crater Subsidence on the Moon

The week of November 6-12 takes us from Day 24 to Day New Moon. This week we will highlight the moon crater Doppelmayer, viewable before sunrise on Tuesday and Wednesday and located in the SW quadrant of the Field Map

Andrew Planck November 6, 2023November 6, 2023 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in November, Venus, Wrinkle Ridge on the moon No Comments Read more

Moon Crater Wargentin: Unique Wrinkle Ridge Pattern

Moon Crater Wargentin: Unique Wrinkle Ridge Pattern

The week of May 15-21 takes us from Day 26 to Day 2. This week we will highlight the moon crater Wargentin, viewable early Sunday morning. Wargentin: [L=60°W] This is one of the more unusual craters on the Moon. When

Andrew Planck May 15, 2023May 10, 2023 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in May, Moon craters, Wrinkle Ridge 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

The Flying Eagle on the Moon – Wrinkle Ridge Dorsum Oppel

The Flying Eagle on the Moon – Wrinkle Ridge Dorsum Oppel

This week we will highlight the wrinkle ridge Dorsum Oppel, a feature informally known as “the Flying Eagle,” viewable on Saturday evening. The Flying Eagle: [NE/H15] As the lava cooled following the impact that created Mare Crisium, a series of

Andrew Planck June 27, 2022 Lunar Days in June, Unusual Features on the Moon, Wrinkle Ridge on the moon No Comments Read more

The Flying Eagle on the Moon: Wrinkle Ridge Dorsum Oppel

The Flying Eagle on the Moon: Wrinkle Ridge Dorsum Oppel

The week of February 14-20 takes us from Day 13 to Day 19. This week we will highlight the wrinkle ridge Dorsum Oppel, a feature informally known as “the Flying Eagle,” viewable on Thursday & Friday night. The Flying Eagle:

Andrew Planck February 14, 2022February 14, 2022 Lunar Days in February, Uncategorized, Unusual Features on the Moon, Wrinkle Ridge on the moon No Comments Read more

Wrinkle Ridge Dorsum Oppel – The Flying Eagle

Wrinkle Ridge Dorsum Oppel – The Flying Eagle

The week of October 4-10 takes us from Day 28 to Day 5. This week we will highlight the wrinkle ridge Dorsum Oppel, a feature informally known as “the Flying Eagle,” viewable on Wednesday night and early Thursday morning. The

Andrew Planck October 4, 2021October 5, 2021 Dates to Observe Objects on the Moon, Lunar Days in October, Ridges on the Moon No Comments Read more

Serpentine Ridge: Best Example of a Wrinkle Ridge

Serpentine Ridge: Best Example of a Wrinkle Ridge

The week of February 1-7 takes us from Lunar Day 20 to 26. This week we will highlight Serpentine Ridge. Serpentine Ridge: [NE/G12] in the Sea of Serenity, west of the crater Posidonius, you will find the Moon’s best example

Andrew Planck February 1, 2021January 31, 2021 Lunar Days in February, Mountain Ranges on the Moon, Ridges on the Moon, Unusual Features on the Moon No Comments Read more

Serpentine Ridge: Moon’s Best Example of a Wrinkle Ridge

Serpentine Ridge: Moon’s Best Example of a Wrinkle Ridge

The week of April 6-12 takes us from Lunar Day 13 to Day 20. This week we will highlight the Serpentine Ridge viewable on Saturday evening. Serpentine Ridge1: [NE/G12] West of the crater Posidonius in the Sea of Serenity you

Andrew Planck April 6, 2020April 6, 2020 Lunar Days in April, Lunar Observers, Ridges on the Moon, Unusual Features on the Moon No Comments Read more

Serpentine Ridge: The Moon’s Best Example of a Wrinkle Ridge

Serpentine Ridge: The Moon’s Best Example of a Wrinkle Ridge

The week of November 26 – December 2 takes us from Day 19 to Day 25. This week we will highlight the Serpentine Ridge, viewable beginning at 10:30 on Monday night.       Serpentine Ridge: [NE/G12] West of the

Andrew Planck November 26, 2018November 26, 2018 Dates to Observe Objects on the Moon, Lunar Days in November, Ridges on the Moon, 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)
  • Clavius – Moon Crater Strewn with Craterlets - June 16, 2025
  • Furnerius – Southernmost Moon Crater That Makes Up the Great Eastern Chain - June 9, 2025
  • Albategnius – 85 mile Complex Moon Crater - June 2, 2025
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