04/18/2016 – Ephemeris – A lunar crater that celebrates the first known proponent of a Sun centered solar system
Ephemeris for Monday, April 18th. The Sun rises at 6:52. It’ll be up for 13 hours and 39 minutes, setting at 8:32. The Moon, 4 days before full, will set at 5:52 tomorrow morning.
The Moon slipped past Jupiter at 1:30 this morning so this evening the planet is to the right of the Moon. The brightest spot on the Moon will appear to the upper left of it tonight in binoculars or a small telescope. It is the crater Aristarchus, named after the Greek philosopher who first proposed a Sun centered solar system in the 3rd century BC. Nobody else bought the idea until 19 centuries later. The crater Aristarchus is a relatively new crater, which on the Moon means it was formed probably less than 1.1 billion years ago, after most cratering had subsided. Mysteriously there have been reports over the years from amateur astronomers and even professionals of seeing transient bright spots or glows emanating from the crater.
Times are for the Traverse City/Interlochen area of Michigan. They may be different for your location.