We all learned about conjunctions in grade school, a memory likely filed away with other early school memories, such as how to do long division and reciting multiplication tables through the number 12 ...

On Dec. 21, after drawing visibly closer and closer in the night sky over the past few months, Jupiter and Saturn will appear the closest they have since March 4, 1226, nearly 800 years ago. They were ...

NASA’s Hubble Space Telescope captured the tattered remains of a supernova explosion known as Cassiopeia A in the Milky Way galaxy. Astronomers at Hawaii observatories are also monitoring supernovae, ...