Contact Lost with Sun-Watching Probe STEREO B
Despite rescue efforts, no one has heard from one of two NASA spacecraft on the far side of the Sun since October 1st.
Bright Spot in Uranus’s Atmosphere
Amateur astronomers have confirmed the presence of a large, bright storm cloud on Uranus.
Breathtaking View of an Icy Water World
A newly processed image from NASA’s Galileo spacecraft shows Europa’s breathtaking beauty and tortured surface in greater detail than ever before.
This Week’s Sky at a Glance, November 28 – December 6
The waxing Moon is well paired with sky delights this week. Mars hangs on as twilight fades away. And Jupiter rises with Regulus for an early-morning treat.
Shadows on the Moon Make a Point
Fooled by shadow play into thinking lunar mountains were pointy pinnacles? Learn why we often see them that way.
Tour December’s Sky: Geminids Return
Our monthly podcast offers the key highlights for stargazing in December: where to find bright stars and planets — and how to spot the Geminid meteor shower.
Watch Asteroid Juno Occult a Star
Watch an asteroid approach a star and block its light, all in a fraction of a second.