Andrew Planck

Astronomer, Teacher, Musician

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Caldwell Object

Crater Bullialdus on the Moon

Crater Bullialdus on the Moon

The week of March 18-24 takes us from Day 9 to Full Moon. This week we will highlight the moon crater Bullialdus, located at SW/M7 on the Lunar Map. Bullialdus: [SW/M7; L=22°W] If you recall what Tycho looked like last

Andrew Planck March 18, 2024March 16, 2024 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in March No Comments Read more

Moon Crater Bullialdus and Ghost Moon Crater Lambert-R

Moon Crater Bullialdus and Ghost Moon Crater Lambert-R

The week of October 3-9 takes us from Lunar Day 7 to Full Moon. This week we will highlight the moon crater Bullialdus and the ghost crater Lambert-R, immediately above the crater Lambert, both viewable on Tuesday evening. Bullialdus: [SW/M7]

Andrew Planck October 3, 2022September 25, 2022 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in September No Comments Read more

Moon Crater Bullialdus and Ghost Crater Lambert-R

Moon Crater Bullialdus and Ghost Crater Lambert-R

The week of August 30 – September 5 takes us from Lunar Day 22 to Day 28. This week we will highlight the moon crater Bullialdus and the ghost crater Lambert-R, immediately above the moon crater Lambert, both viewable around

Andrew Planck August 30, 2021August 28, 2021 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in August No Comments Read more

Bullialdus: Most Conspicuous #MoonCrater on Mare Nubium

Bullialdus: Most Conspicuous #MoonCrater on Mare Nubium

The week of December 11 – 17 takes us from the end of Day 23 to Day 29. This week we will highlight the crater Bullialdus, viewable as soon as the Moon rises early Tuesday morning. Bullialdus: [SW/M7; L=22°W] If

Andrew Planck December 11, 2017 Craters on the Moon, Lunar Days in December, Unusual Features 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)
  • Bailly – Largest Crater on Our Side of the Moon - January 12, 2026
  • Longomontanus: Exception to the Rule About Moon Crater Age - January 5, 2026
  • Schickard: Terrain Made Up of Two Different Chemical Compositions - December 29, 2025
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