We know of a couple of dozen so-called "stellar-mass" black holes in our Milky Way galaxy. They tend to be between about 5 and 20 times as heavy as our sun. This new black hole - in a distant spiral arm of the galaxy - is 70 times as heavy as the sun.

A new study focuses on the axial tilt of Earthlike exoplanets in binary or double star systems. It boosts hope for complex life elsewhere ... although not, these astronomers say, within the star system closest to our sun.

It sounds unbelievable, but a new study from Kagoshima University and the National Astronomical Observatory of Japan says that exoplanets - thousands of them - could be orbiting supermassive black holes.

'Oumuamua - the weird object that entered our solar system in 2017 and quickly fled back toward interstellar space - might not be an asteroid or comet from a distant solar system, as many believed. It might instead be a "cosmic dust bunny."

New observations appear to confirm the existence of water vapor geysers on Europa. The findings are tantalizing, but some scientists are not convinced yet.

Space-based observatories detected a violent explosion in a galaxy billions of light-years away. It became the brightest source of high-energy cosmic gamma rays seen so far. Specialized Earth-based telescopes detected it via faster-than-light particles cascading through Earth's atmosphere.

Scientists have created a recording of the eerie ‘song’ that Earth sings when it’s hit by a solar storm.

The 1st-ever map showing the global geology of Saturn's moon Titan reveals a dynamic world of dunes, lakes, plains, craters and other terrains.

In movies and books, fictional astronauts enter ‘suspended animation’ to cross the vastness of space. Recently ESA investigated how real-life crew hibernation would impact a space mission to Mars.

Scientists are still trying to figure out where Mars' methane comes from. Now there's a new mystery that might be connected: unusual fluctuations of oxygen in Mars' atmosphere, detected by the Curiosity rover.