arcuate rilles

Moon Crater Hippalus: Finest Examples of Arcuate Rilles

The week of May 29 – June 4 takes us from Day 10 to Day 16. This week we will highlight the Hippalus rilles, viewable on Tuesday evening. Rimae Hippalus: [SW/M6; L=29°W] On the east shore of Mare Humorum you

Moon Crater Hippalus – Finest Examples of Arcuate Rilles

This week we will highlight the Hippalus rilles on the moon, viewable early Wednesday morning, and the Leonid meteor shower. Rimae Hippalus: [SW/M6] On the east shore of Mare Humorum, you will find the remnant of the moon crater Hippalus,