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Astronomer, Teacher, Musician

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Moon at apogee

Moon Crater Maginus

Maginus moon crater

The week of September 14-20 takes us from Day 4 to Day 10.  This week we will highlight the moon crater Maginus, visible on Saturday night close to the terminator. Maginus: [SW/Q9; L=6°W] Located at the eastern tip of the

Andrew Planck September 14, 2026September 10, 2026 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in September, Moon craters No Comments Read more

Moon Crater Clavius – Small Notch Out of Terminator of the Moon

Clavius Crater on the moon

The week of August 17-23 takes us from Day 5 to Day 11. This week we will highlight the moon crater Clavius, visible on Saturday night close to the terminator. Clavius: [SW/Q8; L=14°W] If you catch the Moon at the

Andrew Planck August 17, 2026August 11, 2026 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in August, Moon craters No Comments Read more

Mare Frigoris on the Moon and the Gargantuan Hypothesis

Gargantuan Basin on the moon

The week of January 30 to February 5 takes us from Lunar Day 10 to Day 15. This week we will highlight Mare Frigoris, located in the NE quadrant of the Field Map and viewable on Tuesday evening. Mare Frigoris:

Andrew Planck January 30, 2023January 25, 2023 Gargantuan hypothesis, Lunar Days in January 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)
  • Rimae Sirsalis – One of the Longest Rilles on the Moon - October 5, 2026
  • Moon Crater Aristoteles Adjoins the Moon Crater Mitchell to its Immediate East - September 28, 2026
  • Clavius – Crater on the Moon - September 21, 2026
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