Skip to content

Andrew Planck

Astronomer, Teacher, Musician

Menu

  • Home
  • About
  • Shop
    • Cart
    • Checkout
  • Blog
  • Services
  • Resources
  • Contact

Andrew Planck

Schrödinger – Large Impact Moon Crater Called a Walled Plain

Schrodinger moon crater

The week of August 10 takes us from Day 28 to Day 4. This week we will highlight the moon crater Schrodinger, visible on Thursday night close to the terminator. Schrödinger is a large impact moon crater of the form

Andrew Planck August 10, 2026August 6, 2026 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in August, Moon craters No Comments Read more

Longomontanus: Moon Crater Age Not Always Determined by Relative Size

Longomontanus on the moon

The week of August 3 – August 9 takes us from Day 21 to Day 26.  This week we will highlight the moon crater Longomontanus, visible on Thursday night close to the terminator. Longomontanus: [SW/P7; L=22°W] Take a look at

Andrew Planck August 3, 2026August 3, 2026 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in July, Moon craters No Comments Read more

A Hint of Some Multi-Ring Features – Moon Crater Bailly

Bailly crater on surface of the moon

The week of July 27 – August 2 takes us from Day 7 to Day 13.  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

Andrew Planck July 27, 2026July 22, 2026 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in July, Moon craters No Comments Read more

Moon Crater Clavius – Small Notch Chiseled Out of the Terminator

Clavius moon crater

The week of July 20-26 takes us from Day 7 to Day 13.  This week we will highlight the moon crater Clavius, visible on Friday night close to the terminator. Clavius: [SW/Q8; L=14°W] If you catch the Moon at the

Andrew Planck July 20, 2026July 14, 2026 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in July, Moon craters No Comments Read more

Moon Crater Janssen – Larger Diameter than Copernicus

Janssen Lunar Day 9

The week of July 13-19 takes us from Day 29 to Day 6.  This week we will highlight the moon crater Janssen, visible on Tuesday night close to the terminator. Janssen [SE/P13; L=40°E]: Janssen is located 85 miles southwest of

Andrew Planck July 13, 2026July 8, 2026 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in July, Moon craters No Comments Read more

Longomontanus – Exception to the Rule about Moon Craters

crater Longomontanus from space

The week of July 6 to July 12 takes us from Day 22 to Day 28. This week we will highlight the moon crater Longomontanus, visible on Tuesday night close to the terminator. Longomontanus: [SW/P7; L=22°W] Take a look at

Andrew Planck July 6, 2026June 30, 2026 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in July, Moon craters No Comments Read more

Favorable Libration Needed to View Moon Crater Bailly

moon crater Bailly full moon view

The week of June 30 – July 5 takes us from Day 16 to Day 21.  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

Andrew Planck June 29, 2026June 25, 2026 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in June, Moon craters No Comments Read more

Large Impact Moon Crater – Schrodinger

Schrödinger on the moon

The week of June 22-28 takes us from Day 8 to Day 14.  This week we will highlight the moon crater Schrodinger, visible on Tuesday night close to the terminator. Schrödinger is a large impact moon crater of the form

Andrew Planck June 22, 2026June 19, 2026 Craters on the Moon, Dates to Observe Objects on the Moon, Lunar Days in June, Moon craters No Comments Read more

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
  • « Previous

Categories

Fill out my online form.

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

  • Author
  • Recent Posts
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)
  • Schrödinger – Large Impact Moon Crater Called a Walled Plain - August 10, 2026
  • Longomontanus: Moon Crater Age Not Always Determined by Relative Size - August 3, 2026
  • A Hint of Some Multi-Ring Features – Moon Crater Bailly - July 27, 2026
Copyright © 2026 Andrew Planck. All rights reserved. Theme Spacious by ThemeGrill. Powered by: WordPress.