Comet Schwassmann-Wachmann by Andrea Tamanti Arnold Schwassmann and Arno Arthur Wachmann were two German astronomers credited with the discovery of three comets during the first third of the last century. Near the middle of this month, their third discovery will pass by Earth, twenty five times more distant than the Moon, on its latest five … Continue reading "Astrophoto: Comet Schwassmann-Wachmann by Andrea Tamanti"