autumn

Autumn is here

Today, at 20:44 UT, it will be autumn. The Sun looks down on the equator, and day and night have about the same duration. About, at this northern latitude, as today the day here will…


Seasons change, change, change

Summer is retreating. For meteorologists autumn started on Sept. 1, for us astronomer it starts on September 22 (22:44h CET DST). The night sky is changing from summer triangle (the stars Altair, Deneb and Vega)…