Scientists use stellar mass to link exoplanets to planet-forming disks
Thursday, 24 June 2021 02:15
First clear view of a boiling cauldron where stars are born
Thursday, 24 June 2021 02:15
GMV develops a new maritime Galileo receiver
Thursday, 24 June 2021 02:15
Finnish company will test tiny, wooden satellite in space
Thursday, 24 June 2021 02:15
Use of additional Metop-C and Fengyun-3 CD data improves regional weather forecasts
Thursday, 24 June 2021 02:15
PROTEUS transitions to Marine Corps Warfighting Lab
Thursday, 24 June 2021 02:15
Report: Space Force has to prepare for operations beyond Earth’s orbit
Wednesday, 23 June 2021 22:10
WASHINGTON — A new report published by the Air Force Research Laboratory suggests the U.S. Space Force has to prepare for a day when the moon and the volume of space around it could become the next military frontier.
Masten delays first lunar lander mission
Wednesday, 23 June 2021 21:37
WASHINGTON — Masten Space Systems is pushing back the launch of its first lunar lander mission by nearly a year, the latest in a series of delays by companies with NASA contracts to transport payloads to the moon.
Army, Navy satellite operations to consolidate under Space Force
Wednesday, 23 June 2021 20:31
WASHINGTON — The U.S. Space Force later this year will begin to take over the operation of 11 Navy narrowband communications satellites. It also will absorb Army units that currently operate military communications payloads, a Space Force official said June 23.
Nelson says Artemis plans pending decision on GAO protest
Wednesday, 23 June 2021 18:49
WASHINGTON — NASA Administrator Bill Nelson told a House committee June 23 that NASA is awaiting a decision from the Government Accountability Office on protests of the agency’s lunar lander contract before releasing more details on plans to return humans to the moon.
Astrocast mulls going public to expand to 100 satellites
Wednesday, 23 June 2021 17:40
TAMPA, Fla. — Swiss startup Astrocast is considering becoming a public company to expand its constellation for connecting internet of things (IoT) devices.
The venture has hired European investment bank Bryan, Garnier & Co to explore selling a 30-40% stake on the Euronext Growth stock exchange.
Europe seeks disabled astronauts, more women in space
Wednesday, 23 June 2021 16:50
ULA delays further use of enhanced upper-stage engine pending studies
Wednesday, 23 June 2021 16:01
WASHINGTON — United Launch Alliance will not be using an upgraded upper-stage engine in upcoming Atlas 5 missions as the company investigates the source of vibrations seen during a May 18 flight.
Video: Simulating atmospheric reentry in a plasma wind tunnel
Wednesday, 23 June 2021 13:23
Simulating the burn-up during atmospheric reentry of one of the bulkiest items aboard a typical satellite using a plasma wind tunnel.
This Solar Array Drive Mechanism (SADM) has the essential task of keeping a satellite's solar wings trained on the Sun, maintaining mission operations.
But its bulky nature presents a problem in terms of space debris guidelines. When a spacecraft reenters on an uncontrolled basis, the spacecraft operator has to prove that the on-ground casualty risk posed by its satellite is lower than 1 in 10 000.
So last year SADM manufacturer Kongsberg Defense & Aerospace (KDA) started an investigation supported by ESA, Hyperschall Technologie Göttingen GmbH (HTG) and the German Aerospace Center (DLR) to demonstrate the 'desmisability' of one of its satellite products.
They began by modeling such a reentry using ESA's dedicated SCARAB (Spacecraft Atmospheric Reentry and Aerothermal Break-up) software and comparable resources, tweaking the SADM by switching one screw to lower-melting-point alumimium to promote an earlier, higher-altitude breakup.
Image: Jezero Crater's 'Delta scarp'
Wednesday, 23 June 2021 13:12