Showing 20 articles starting at article 921
Categories: Space: Astronomy, Space: Exploration
Published Last of universe's missing ordinary matter
(via sciencedaily.com) Researchers have helped to find the last reservoir of ordinary matter hiding in the universe.
Published Options to optimize profit in broadband satellite constellations
(via sciencedaily.com) Several large telecommunications companies have proposed plans to provide global broadband services by launching hundreds and even thousands of satellites into orbit. Although broadband for everyone sounds like a great idea, it also carries great financial risk, resulting in bankruptcy for some who've tried it. Recent research suggests a more cost-effective strategy using regional coverage and staged deployment.
Published Researchers shine a light on more accurate way to estimate climate change
(via sciencedaily.com) By using satellite data from different major land-based ecosystems around the globe, researchers have found that the photosynthesis glow is the same across all vegetation, no matter the location. This first-of-its-kind global analysis could have significance in providing more accurate data for scientists working to model carbon cycle and eventually help better project climate change.
Published Frequency-stable laser systems for space
(via sciencedaily.com) For the first time a frequency reference based on molecular iodine was successfully demonstrated in space! What sounds a bit like science fiction is an important step towards laser interferometric distance measurements between satellites as well as for future global navigation satellite systems based on optical technologies. The frequency reference tests were carried out on May 13 on board the sounding rocket TEXUS54.
Published May the forest be with you: GEDI moves toward launch to space station
(via sciencedaily.com) GEDI (pronounced like 'Jedi,' of Star Wars fame) is a first-of-its-kind laser instrument designed to map the world's forests in 3-D from space. These measurements will help fill in critical gaps in scientists' understanding of how much carbon is stored in the world's forests, the potential for ecosystems to absorb rising concentrations of carbon dioxide in Earth's atmosphere, and the impact of forest changes on biodiversity.
Published Weather satellites aid search and rescue capabilities
(via sciencedaily.com) Original source The same satellites that identify severe weather can help save you from it. NOAA's GOES series satellites carry a payload supported by NASA's Search and Rescue (SAR) office, which researches and develops technologies to help first responders locate people in distress worldwide, whether from a plane crash, a boating accident or other emergencies.
Published Laser-ranged satellite measurement now accurately reflects Earth's tidal perturbations
(via sciencedaily.com) Original source Tides on Earth have a far-reaching influence, including disturbing satellites' measurements by affecting their motion. The LAser RElativity Satellite (LARES), is the best ever relevant test particle to move in the Earth's gravitational field. In a new study, LARES proves its efficiency for high-precision probing of General Relativity and fundamental physics.