The Alpine Valley Rille Lunar Feature
Target Type R. A. Dec. Constellation Magnitude Size Vallis Alpes Rille Rille n/a n/a n/a n/a >80 miles Overview I haven’t set a lunar observation challenge since September, so it feels appropriate to have another as we begin 2021. This time, we are hunting a lunar rille. These appear as long, narrow gashes in the …