The Ring Nebula (M57) was first discovered in the winter of 1779. But by whom? Some claim it was French astronomer Antoine Darquier de Pellepoix, while others insist it was Charles Messier. However, ...
The universe is a vast icebox punctuated by far-flung islands of unbearable heat. Places that could be considered comfortable — neither hot nor cold — are so rare as to be essentially nonexistent. Of ...