Scientists discovered that Palomar 5 has a large proportion of black holes and will one day lose all its stars and be made entirely of black holes.

A new study from researchers at the University of Naples in Italy suggests that highly-evolved, Earth-like biospheres may be rare on exoplanets. Many stars either don't emit enough energy for life to develop past the basic photosynthesis stage or don't live long enough for life to evolve on any planets that may otherwise be suitable.

The final shuttle mission - a flight of space shuttle Atlantis - launched on July 8, 2011. Watch a live replay.

A newly-discovered mini-Neptune's atmosphere is ideal for study by space telescopes.

"We started by asking ‘what’s this weirdo?’ the astronomers said. Now they recognize SN 2018zd as an electron-capture supernova.

Astronauts performed the first space walk on Tiangong, China's new space station, on July 4, 2021. They are now preparing it to be inhabited by future crews.

Scientists using the Kepler telescope have found a new population of rogue planets, or free-floating planets, unconnected to any star.

The most-massive white dwarf now known is ZTF J1901+1458. It's thought to have formed when 2 less massive white dwarfs merged. It has 1.3 times our sun's mass.

Scientists think they've solved the mystery of why NASA's Curiosity rover keeps detecting methane on Mars, but ESA's Trace Gas Orbiter doesn't.

NASA’s Deep Space Atomic Clock has outperformed all other clocks in space during its first year in orbit around Earth. The clock is at least 10 times more stable than those used on GPS satellites, researchers report June 30, 2021 in the journal Nature.