Elusive CRATER EINSTEIN out of the shadows

摘要

In the small hours of the morning of 12 November 2019, the nearly full Moon will be sinking into the west in UK skies, but it will offer a rare opportunity to observe one of its largest and most elusive craters. Einstein is situated right on the Moon's western limb, in part beyond 90° W. This means that it lies in a libration zone and is only seen properly when the Moon's tilt is favourable in that direction.