This year's fall equinox will occur at about 7:20 a.m. on September 22 for San Diego. The day of equal amounts of day and night sees the sun rise due east and set due west. …
September 20, 2016
Stephen Williams is the head of the Department of Physics at the University of Crete in Heraklion.
Articles by Stephen Williams
Look for Betelgeuse on Thursday
This week's Perseid meteor shower could deliver 200 meteors per hour
Comet Swift-Tuttle graced our skies last in 1992, though it was observed as far back as 69 B.C. by the Chinese. The Earth passes through the particles left behind by the comet every year in …
August 8, 2016