Andrew Planck

Astronomer, Teacher, Musician

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The Rival of Mars

Moon Crater Janssen versus Copernicus, Queen of Moon Craters

Moon Crater Janssen versus Copernicus, Queen of Moon Craters

The week of September 26 – October 2 takes us from Lunar Day 1 to Day 8. This week we will highlight the crater Janssen, viewable Thursday evening very close to the terminator, and Friday evening. Janssen: [SE/P13; L=40°E] Janssen

Andrew Planck September 26, 2022September 25, 2022 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in September, 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)
  • Moon Crater Maurolycus in the Lunar Highlands - July 14, 2025
  • Moon Crater Janssen Located 85 miles Southwest of the Rheita Valley - July 7, 2025
  • Albategnius – How to Observe This Stunning Moon Crater Near the Terminator - June 30, 2025
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