Researchers at the Department of Energy's Oak Ridge National Laboratory, in collaboration with NASA, are taking additive manufacturing to the final frontier by 3D printing the same kind of wheel as the design used by NASA for its robotic lunar rover, demonstrating the technology for specialized parts needed for space exploration.

The additively manufactured wheel was modeled on the existing, light-weight wheels of the Volatiles Investigating Polar Exploration Rover, or VIPER, a mobile robot NASA plans to send in 2024 to map ice and other potential resources at the south pole of the moon.

Our planet is being continuously bathed in radio signals from satnav satellites—which are useful for much more than just navigation. Dedicated space missions acquire these signal reflections to amass valuable environmental information. The shoebox-sized PRETTY CubeSat, flying on Europe's next Vega launcher, will investigate a new frequency and novel observation angle to better measure the rate of climate change—at the same time as gathering radiation data on its surrounding space environment.

The PRETTY, Passive REflecTometry and dosimeTrY, mission will peer ahead to the horizon to receive signals from Global Navigation Satellite System (GNSS) satellites visible just above it. Two patch antennas on its forward face will pick up the same signal from the same satellite—or rather one signal that has reached it through space and the equivalent signal that has reflected off Earth's cryosphere or oceans.

Using a highly advanced version of "spot the difference" PRETTY will compare the twin signals onboard to derive ice and sea height to an accuracy of at least 50 cm from 550 km orbital altitude.

Euclid has found its "lost" guide stars as a software patch has solved its navigation woes and the next six years of observation schedules have been redesigned to avoid stray sunlight: it's the end of an interesting commissioning phase and Euclid will now undergo its final testing in full "science mode.

The smallest flowering plant on Earth might become a nutritious foodstuff for astronauts in the future, as well as a highly efficient source of oxygen. To help test their suitability for space, floating clumps of watermeal—individually the size of pinheads—were subjected to 20 times normal Earth gravity aboard ESA's Large Diameter Centrifuge by a team from Mahidol University in Thailand.

Based at ESA's ESTEC technical center in the Netherlands, the LDC is an 8-m-diameter, four-arm centrifuge that gives researchers access to a range of hypergravity up to 20 times Earth gravity for weeks or months at a time.

Access to the LDC was arranged through HyperGES, part of the Access to Space for All initiative sponsored by ESA and the United Nations Office of Outer Space Affairs, UNOOSA.

Amazon is set to launch two satellites on Friday, in its first test mission as part of its plan to deliver the internet from space and compete with Elon Musk's Starlink service.

The launch window for the Atlas V rocket from the United Launch Alliance (ULA) hub at Kennedy Space Center in Florida is scheduled to open for two hours at 2:00 pm local time (1800 GMT).

Once up and running, the company founded by Jeff Bezos says its Project Kuiper will provide "fast, affordable broadband to unserved and underserved communities around the world," with a constellation of more than 3,200 satellites in low Earth orbit (LEO).