One day that has room for three distinct astronomical events.
A celestial meet-cute will unfold before our eyes on Monday. Here’s why you should be excited about that.
On Dec. 21, Jupiter and Saturn will appear to be no more than a dime’s width apart in the night sky. The last time that could be seen was in 1226.
“The Uranus jokes never end,” an astronomer said.
Two veteran space journalists discuss why so much attention and budget seems to be directed to the red planet.
New simulations explain how the ringed planet ended up with one giant moon that domineers its tinier siblings.