"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.

In Virgin Orbit's 3rd-ever space mission, the air-launched LauncherOne rocket carried seven satellites to orbit on June 30, 2021. Virgin Orbit announced all seven payloads had successfully reached their target orbits.

Swiss-led telescope CHEOPS unexpectedly captured a surprise photobomb of a planet 50 light-years away. This planet is now a "golden target," scientists said.

What happens when black holes swallow neutron stars? Scientists could only speculate until recently. Now we have measurements of 2 such events!

Scientists have calculated that 2,034 stars within 326 light-years have an opportunity to detect Earth using the transit method.