Astronomers are highly aware that the vast majority of matter in our universe is invisible, or 'dark.' So what the heck is it? Well, now we have a good idea as to what it probably isn't.
Computer analysis of the wobble of a nearby star may have turned up evidence for a small, Earth-sized world — but don't get too excited about it being habitable.
Was the 1977 'Wow!' signal communications from an alien civilization? Or was it interference from a passing comet? In 2017, we may finally have an answer.
If it is out there, the hypothetical Planet 9's gravity probably isn't impacting the orbit of NASA's Saturn mission.
A highly sensitive radio telescope has seen something peculiar in the depths of our cosmos: A group of supermassive black holes are mysteriously aligned, as if captured in a synchronized dance.
The 'Rogue One: A Star Wars Story' trailer has been released and it will chronicle the story of the Rebel spies who stole the Death Star's plans.
As astronomers track down more clues as to the existence of a large world orbiting the sun in the outer fringes of the solar system, a classic planetary purveyor of doom has been resurrected.
Comet P/2016 BA14 was initially thought to be a cosmic lightweight, but as it flew past Earth on March 22, NASA pinged it with radar to reveal just what a heavyweight it really is.
The Discovery Channel Telescope has played a key role in identifying what could be one component of a comet twin -- both expected to fly past Earth later this month.
Astronomers have studied a violent young sun-like star, revealing that life on Earth is lucky to have such a strong global magnetic field.
Astronomers have observed a supermassive black hole in a distant quasar and made a stunning discovery — it's spinning one-third the speed of light.
NASA's New Horizons has found an icy oddity that highlights one of the key processes that is believed to shape this dwarf planet's surprisingly young surface.
It's eclipse season for NASA's Solar Dynamics Observatory (SDO), a time when our own planet can't bear to to be out of the spotlight and barges its way into the shot.
When you go for your annual health checkup, you might expect the doctor to take your temperature. Well, it looks like Saturn's moons also get the same treatment, courtesy of NASA.
If a space rock hits the atmosphere, and no one is around to hear it, does the tabloid press still report it as an Earth-shattering event?
In a dramatic new composite image released by NASA, 23 high-definition observations of our nearest star have been compiled creating the mother of all solar portraits.
The British mapping agency Ordnance Survey has created a map of the Martian surface using precision NASA data — and it's beautiful.
Black hole theoretical physicist Stephen Hawking has some thoughts on the discovery of gravitational waves.
The merging black holes generated a gravitational wave signal from 1.3 billion light-years away -- but which direction did they come from?
Get the full Mark Watney experience and immerse yourself in a "virtual reality" Mars landscape courtesy of NASA's Mars rover Curiosity.
Gravity waves, gravitational waves and primordial gravitational waves... what do they mean? Is there a difference?
More gravitational wave discovery rumors are flying, but this time they've taken a specific – and, possibly, really exciting – new twist.