Tonight is "blue moon Eve" (see the May 31 entry for more details). Late tonight, look toward the southeast to see one of the sky's most striking color contrasts. The bright, nearly full moon will be ...

The moon is still dim enough that on a clear night this week, we will have great viewing conditions for stars and planets ...

North America’s celestial highlights for the week ahead, which also apply to mid-northern latitudes in the northern hemisphere.

May’s sky features not one but two full moons as well as the dazzling Eta Aquarids meteor shower. Here’s when to look up for the month’s most striking alignments.