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Astronomer, Teacher, Musician

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Month: June 2026

Petavius: Floor-Fractured Moon Crater

Day 3 Petavius moon crater

The week of June 15-21 takes us from Day 1 to Day 7.  This week we will highlight the moon crater Petavius, visible on Tuesday night close to the terminator. Petavius: [SE/M16; L=60°E] This is one of the most fascinating

Andrew Planck June 15, 2026June 10, 2026 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in June, Moon craters No Comments Read more

Mare Humorum: “Sea of Moisture” Basin One of Best Examples of Subsidence

Mare Humorum

The week of June 8-14 takes us from Day 23 to Day 29. This week we will highlight Mare Humorum, visible on Tuesday night close to the terminator. Mare Humorum: [SW/M6; L=39°W] The Humorum (“Sea of Moisture”) basin is one

Andrew Planck June 8, 2026June 2, 2026 Lunar Days in June, Subsidence on the Moon No Comments Read more

Moon Crater Bailly – Over 3 Billion Years Old

moon crater Bailly on surface of the moon

The week of June 1-7 takes us from Day 16 to Day 22. This week we will highlight the moon crater Bailly, visible on Tuesday night close to the terminator. Bailly: [SW/R3; L=69°W] To observe this moon crater, it is

Andrew Planck June 1, 2026June 2, 2026 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in June, Moon craters 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)
  • Petavius: Floor-Fractured Moon Crater - June 15, 2026
  • Mare Humorum: “Sea of Moisture” Basin One of Best Examples of Subsidence - June 8, 2026
  • Moon Crater Bailly – Over 3 Billion Years Old - June 1, 2026
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