Sirius is the brightest star as seen from Earth and is visible from both hemispheres. It lies just 8.6 light-years away, in the constellation Canis Major.
A new analysis of images from the Galileo mission has revealed deposits of ammonia on Europa. It could mean a geologically active crust and habitable ocean.
Spring fireball season is now! The rate of fireballs (bright meteors) often goes up in the Northern Hemisphere by as much as 30% from February through April.