What’s Up! September 2021

A monthly look at astronomical events in the sky and on Earth 

Compiled by John Rowland

Well, here we are again at the start of another astronomical season. Autumn can offer quite pleasant observing opportunities as the ground still retains some of the residual heat built up over the summer and the evening temperatures don’t drop too low. In addition, September and October are two of the most atmospherically stable months, with less rain, less cloud and a higher proportion of nights with good seeing. Continue reading