Helium hydride has been hiding for 13 billion years. Scientists finally found it.
A picture that's worth a thousands "whoas."
A supermassive black hole has been revealed.
The rover just watched Phobos and Deimos, the two moons of Mars, pass in front of the sun.
A group of scientists have disproved Stephen Hawking's proposed explanation for mysterious dark matter.
Literally and figuratively...very metal.
An announcement next week by an international collaboration might contain the first-ever photo of a black hole's event horizon.
Meet Ryugu and Bennu, two small worlds near Earth with big surprises inside.
So many worlds have gone rogue.
Japan's Hayabusa 2 spacecraft will perform a flyby sample-collection mission on a distant asteroid.
The "Super Snow Moon," the second of this year's three supermoons, will appear about 10 percent larger than an average full moon.
New Horizons' latest target is the weirdest shaped asteroid we've ever seen.
A salute to the space mission so good it made the discovery of far-out planets ... boring.
A new survey of more than a thousand stars reveals the true shape of our galaxy.
Ancient collisions thousands of light-years away could teach us about the formation of our own solar system.
The tiny galaxy is very close, but remained hidden for decades until a group of astronomers spotted it entirely by accident.
The newly discovered system could lead to finding even stranger distant planets.