JAXA

The European Space Agency says its Ramses spacecraft, being built to meet the asteroid Apophis, has been switched on for the first time as an assembled spacecraft, at its prime contractor's cleanroom…

Astronomers using the NASA and JAXA observatory XRISM have measured gas pouring off a giant star and falling onto the small, collapsed star that orbits it, at about 335,000 miles per hour. The team,…

Solar particles thrown out by an eruption on the Sun reached the bare surface of Mercury while the BepiColombo spacecraft flew close overhead, researchers led by the University of Helsinki report in…

The European Space Agency said BepiColombo separated its Mercury Transfer Module from the rest of the spacecraft on Sept. 3. The maneuver is the first step in an arrival sequence that will place the…

Shortly after 1 p.m. BST on Sept. 3, the flight control team at ESA's European Space Operations Centre in Darmstadt was not watching a spacecraft. It was listening for a signal. More than 200 million…

The Japan Meteorological Agency will begin feeding observations from a microwave sensor aboard a Japanese satellite launched last year into the computer model that underpins its public weather…

Researchers at Arizona State University and two partner institutions tumbled stony meteorites in a laboratory mill and measured how long each took to fall apart. The number of rotations needed to…

Two reference models of Venus's atmosphere disagree with 18 years of spacecraft temperature measurements by more than 10 K, or 10 degrees Celsius, according to a paper posted to the arXiv preprint…

More than four and a half billion years ago, a lump of ice and dust in the outer Solar System got warm enough to melt inside. Water seeped through the rock, dissolved what it could, and eventually…