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Archimedes

Moon Crater Plato

Plato's original floor is actually 1.5 miles deeper than it appears.

The week of January 26 – February 1 takes us from Day 8 to Day 14. This week we will highlight the moon crater Plato, visible on Tuesday night close to the terminator. Plato: [NW/D9; L=9°W] Wait until the terminator

Andrew Planck January 26, 2026January 28, 2026 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in January, Moon craters No Comments Read more

Moon Crater Cassini – Created on Imbrium floor Before Lavas Started to Flow

Cassini crater on the moon

The week of January 19-25 takes us from Day 1 to Day 7. This week we will highlight the moon crater Cassini, visible on Sunday night close to the terminator. Cassini: [NE/E10; L=5°E] Can you tell by looking at Cassini

Andrew Planck January 19, 2026January 28, 2026 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in January, Moon craters No Comments Read more

Moon Crater Plato – Crater Floor Presents Interesting Challenge

Plato crater on the moon

The week of November 20-26 takes us from Day 8 to Full Moon. This week we will highlight the moon crater Plato, viewable on Tuesday evening and located in the NW quadrant of the Field Map at D9. Plato: [NW/D9;

Andrew Planck November 20, 2023November 6, 2023 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in November, Moon craters, Uranus No Comments Read more

Archimedes: Prominent 50-mile Moon Crater with Terraces

Moon crater Archimedes is a magnificent sight with shadow spires stretching across its internal plains

The week of July 3 – July 9 takes us from Day 15 to Day 22. This week we will highlight the moon crater Archimedes, viewable after midnight on Sunday. Archimedes1: [NW/G9; L=4°W] This is a prominent 50-mile moon crater

Andrew Planck July 3, 2023July 3, 2023 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in July No Comments Read more

Mare Imbrium – One Time Multi-Ring Basin on the Moon

Mare Imbrium

The week of June 26-July 2nd takes us from Day 8 to Day 14. This week we will highlight Mare Imbrium on the moon, which should be 80% visible on Tuesday evening. The Moon has now entered its gibbous phase

Andrew Planck June 26, 2023June 28, 2023 Lunar Days in June, Multi-ring basin on the moon No Comments Read more

Moon Crater Archimedes and Story Behind “Eureka, I have found it!”

moon crater Archimedes

The week of October 25-31 takes us from Day 20 to 25. This week we will highlight the moon crater Archimedes, viewable after midnight on Wednesday, Day 22. Archimedes1: [NW/G9; L=4°W] This is a prominent 50-mile crater with terraces and

Andrew Planck October 25, 2021October 25, 2021 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in October, Lunar Observers No Comments Read more

The History and Beauty of Moon Craters Linné and Cassini

Moon craters Linné and Cassini

The week of December 2 – 8 takes us from Day 6 to Day 11. This week we will highlight the craters Linné and Cassini, viewable on Tuesday evening. Linné: [NE/G11] Linné is a simple, relatively young crater with an

Andrew Planck December 2, 2019December 1, 2019 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in December 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)
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