Andrew Planck

Astronomer, Teacher, Musician

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moon crater Fabricius

Moon Crater Janssen – 85 miles Southwest of the Rheita Valley

Moon Crater Janssen – 85 miles Southwest of the Rheita Valley

The week of August 11-17 takes us from Day 18 to Day 24. This week we will highlight the moon crater Janssen visible on Tuesday night close to the terminator. Janssen: [SE/P13; L=40°E] Janssen is located 85 miles southwest of

Andrew Planck August 11, 2025August 7, 2025 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in August, Moon craters, Rilles on the Moon No Comments Read more

Moon Crater Janssen Located 85 miles Southwest of the Rheita Valley

Moon Crater Janssen Located 85 miles Southwest of the Rheita Valley

The week of July 7-13 takes us from Day 13 to Day 19. This week we will highlight the moon crater Janssen, visible on Saturday and Sunday nights close to the terminator. Janssen: [SE/P13; L=40°E] Janssen is located 85 miles

Andrew Planck July 7, 2025July 3, 2025 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in July, Moon craters, 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
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