Four Planets Await After Sunset

Right now, in the night sky just after sunset, you have a chance to see three alien worlds at the same time. Venus and Uranus are currently undergoing a close encounter; tonight (Mar. 5) they'll be a little over a degree apart, just about three times the width of the full Moon on the sky. Below them, not far away (maybe 10° or so) is red Mars. To see them look to the west after sunset. It's best to wait a few minutes for the sky to get dark. Venus is pretty obvious; it's the third brightest na...