On Tuesday, the Mars rover Opportunity completed a marathon – 26.2 miles (42.195 kilometers). Its finish time? Eleven years and 2 months.
Jupiter may have swept through the early solar system like a wrecking ball, destroying a first generation of inner planets before retreating into its current orbit.
First topographical map of Ceres with named quadrangles. Scientists announced the names at last week’s Lunar and Planetary Science Conference.
The stars might be singing – but, since sound can’t propagate through the vacuum of space, no one can hear them.
New Horizons spacecraft will sweep past Pluto and its moons on July 15, revealing their surface features for the first time! You’re invited to help choose names.
The Southern Hemisphere has had two Great Comets recently – McNaught in 2007 and Lovejoy in 2011. When will the Northern Hemisphere get one?
What if an advanced civilization could collect all of the energy emitted by its star?
On the day of the equinox, the center of the sun would set about 12 hours after rising – given a level horizon, as at sea, and no atmospheric refraction.
Awesome photos of the March 20 solar eclipse, by EarthSky Facebook and G+ friends lucky enough to see it, and kind enough to share their pics.