Congratulations to all Catholics. Yesterday, your College of Cardinals elected a new pope. In honor of him taking the name Leo XIV, I thought this would be a good time to tell you some facts about the ...

The constellation Leo, containing the bright star Regulus (α Leonis), is visible in the southwest after sunset. R Leonis, a Mira-type variable star and the first such star identified in Leo, is ...

Today's ESA/Hubble Picture of the Week features a galaxy that Hubble has captured multiple times over more than 20 years. The galaxy is called NGC 3370, and it is a spiral galaxy located nearly 90 ...