Andrew Planck

Astronomer, Teacher, Musician

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Earthshine

Brightest Spot on the Moon: Moon Crater Aristarchus

Brightest Spot on the Moon: Moon Crater Aristarchus

The week of May 16-22 takes us from Day 16 to Day 23. This week we will highlight the moon crater Aristarchus. Aristarchus: [NW/G5; L=47°W] The moon crater Aristarchus is the brightest spot on the Moon. It is so bright

Andrew Planck May 16, 2022May 15, 2022 Dates to Observe Objects on the Moon, Lunar Days in May, Unusual Features on the Moon No Comments Read more

Moon Crater Humboldt: Cluster of Central Peaks and Crater Chain

Moon Crater Humboldt: Cluster of Central Peaks and Crater Chain

The week of March 28 – April 3rd takes us from Day 26 to Day 3. This week we will highlight the moon crater Humboldt. Humboldt1: [SE/M18] This moon crater is best viewed when there is a pronounced libration; tonight

Andrew Planck March 28, 2022March 27, 2022 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in March No Comments Read more

The Glow of Earthshine on the #Moon

The Glow of Earthshine on the #Moon

The week of July 9-15 takes us from Day 26 to Day 3. Because the week straddles New Moon, which is on Thursday, there are no days which are particularly good for viewing the Moon. However, one of the loveliest

Andrew Planck July 9, 2018July 9, 2018 Dates to Observe Objects on the Moon, Lunar Days in July, Mars, Unusual Features on the Moon No Comments Read more

Earthshine: A Scene of Transcendental Beauty and Galileo’s Observation about Venus

Earthshine: A Scene of Transcendental Beauty and Galileo’s Observation about Venus

The week of January 30th – Feb. 5th takes us from Lunar Day 3 into Day 9. This week we will highlight the phenomenon of Earthshine and the planet Venus. One of the loveliest views of the Moon can be

Andrew Planck January 30, 2017January 30, 2017 Dates to Observe Objects on the Moon, Lunar Days in January, Venus 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)
  • Clavius – Moon Crater Strewn with Craterlets - June 16, 2025
  • Furnerius – Southernmost Moon Crater That Makes Up the Great Eastern Chain - June 9, 2025
  • Albategnius – 85 mile Complex Moon Crater - June 2, 2025
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