A database run by the American Association of Variable Star Observers will organize and archive data on transiting exoplanets collected by amateur astronomers.
Astronomers have suspected for some time that the Large and Small Magellanic Clouds collided in the recent past. The Gaia space telescope provides striking new evidence for a head-on collision.
A recent study has discovered three of the fastest stars known in the Milky Way. But these stars may be more than just speeders — they might also be evidence of how Type Ia supernovae occur.
Coastal waves from mid-sized asteroid impacts might be more like a storm surge than a wall of watery destruction, according to NASA experiments with paintballs.
One of the closest stars to the Sun appears to host a planet at least three times as massive as our own where temperatures might be just low enough to freeze liquid water.
Now you see it, now you don’t. McNeil’s Nebula in Orion has disappeared, thanks to a drastic reduction in brightness from the protostar that usually provides illumination.
A low-mass sun with few elements heavier than helium provides hope that the Galaxy might contain survivors from the very first generation of stars.
Electrostatic discharge in a simulated Martian environment yields perchlorates — a potential energy source for microbial life — at abundances much greater than sunlight alone.
Arizona comet hunter Don Machholz did it again! He discovered his 12th comet only two mornings ago. Set your alarm, grab your scope, and take a look.
Donatiello I is a tiny galaxy about 10 million light-years away, and it was discovered by an Italian hobbyist with a homemade telescope.