Andrew Planck

Astronomer, Teacher, Musician

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Lunar Swirls

Lunar Swirl Reiner Gamma and the Struve/Russel Moon Crater

Lunar Swirl Reiner Gamma and the Struve/Russel Moon Crater

The week of August 26 – September 1 takes us from Day 22 to Day 29. This week we will highlight the lunar swirl Reiner Gamma and the Struve/Russel moon crater, located in the NW quadrant of the Field Map

Andrew Planck August 26, 2024August 22, 2024 Craters on the Moon, Lunar Days in August, Lunar Swirls, Moon craters No Comments Read more

Lunar Swirl Reiner Gamma – Flat Features That Cast No Shadows

Lunar Swirl Reiner Gamma – Flat Features That Cast No Shadows

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

Reiner Gamma – Lunar Swirl on the Moon

Reiner Gamma – Lunar Swirl on the Moon

The week of August 22-28 takes us from Lunar Day 25 to Day 1. This week we will highlight Reiner Gamma, lunar swirl on the moon, viewable early Tuesday morning. Reiner Gamma: [NW/J4] Lunar swirls are absolutely flat features that

Andrew Planck August 22, 2022August 18, 2022 Dates to Observe Objects on the Moon, Lunar Days in August, Lunar Observers, Lunar Swirls No Comments Read more

Lunar Swirl Reiner Gamma and Two Overlapping Moon Craters, Struve and Russel

Lunar Swirl Reiner Gamma and Two Overlapping Moon Craters, Struve and Russel

The week of September 28 – October 4 takes us from Lunar Day 12 to Day 17. This week we will highlight the lunar swirl Reiner Gamma, visible throughout the week starting on Tuesday evening, and the craters Struve/Russel, visible

Andrew Planck September 28, 2020September 28, 2020 Lunar Days in September, Lunar Swirls, Unusual Features on the Moon No Comments Read more

Mons Rümker and Reiner Gamma: Complex of Domes and Lunar Swirls on the Moon

Mons Rümker and Reiner Gamma: Complex of Domes and Lunar Swirls on the Moon

The week of August 12-18 takes us from Day 12 to the end of Day 17. This week we will highlight Mons Rümker and Reiner Gamma. Mons Rümker: [NW/E4] Unfortunately this feature is too close to the Moon’s limb to

Andrew Planck August 12, 2019August 12, 2019 Dates to Observe Objects on the Moon, Domes on the Moon, Lunar Days in August, Lunar Swirls 1 Comment Read more

Complex of Domes and Lunar Swirls on the Moon

Complex of Domes and Lunar Swirls on the Moon

The week of June 25 – July 1 takes us from the end of Day 12, close to full moon, to Day 18. This week we will highlight Mons Rümker, viewable Monday, and the lunar swirl Reiner Gamma viewable all

Andrew Planck June 25, 2018June 25, 2018 Dates to Observe Objects on the Moon, Domes on the Moon, Lunar Days in June, Lunar Swirls, Saturn, Unusual Features on the Moon No Comments Read more

Lunar Swirls – Explore Reiner Gamma on the Moon

Lunar Swirls – Explore Reiner Gamma on the Moon

The week of Oct. 16-22 takes us from the end of Day 26 to the beginning of Day 3. The Moon does not rise until nearly 4:00 A.M. on Monday morning. This week we will highlight the lunar swirl Reiner

Andrew Planck October 16, 2017 Dates to Observe Objects on the Moon, Lunar Days in October, Lunar Observers, Lunar Swirls No Comments Read more

Lunar Swirls: Reiner Gamma – Eerily Reminiscent of Crop Circles

Lunar Swirls: Reiner Gamma – Eerily Reminiscent of Crop Circles

The week of April 18-24 takes us from lunar Day 12 through Day 17. Full Moon will be on Thursday. This week we will highlight lunar swirls. Reiner Gamma: [NW/J4; L=59°W] (Visible starting Tues.) Lunar swirls are absolutely flat features

Andrew Planck April 18, 2016April 18, 2016 Lunar Days in April, Lunar Swirls 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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