Launching today is America’s classified NROL-44 spy satellite, which German public broadcaster DW calls “a massive, open secret”: NROL-44 is a huge signals intelligence, or SIGINT, satellite, says David Baker, a former NASA scientist who worked on Apollo and Shuttle missions, has written numerous books, including U.S. Spy Satellites and is editor of SpaceFlight magazine. “SIGINT satellites are the core of…
Tag: space debris
Space debris observed for the first time during the day
On the afternoon of February 10, 2009, the operational communications satellite Iridium 33 collided with the obsolete Cosmos 2251 communications satellite over Siberia at an altitude of roughly 800 kilometers. The collision was at a speed of 11.7 kilometers a second and produced a cloud of more than 2,000 pieces of debris larger than ten centimeters. This debris spread out over…
Astronomers issue report on the effect of ‘satellite constellations’ on astronomy
A new report concludes that large constellations of bright satellites in low-Earth orbit will fundamentally change ground-based astronomy and impact the appearance of the night sky for stargazers worldwide. Source: https://earthsky.org/space/astronomers-report-effect-of-satellite-constellations-astronomy…
For Space Junk Cleanup, DragRacer Satellite Will Test ‘Terminator Tape’ This Fall
schwit1 quotes Space.com: An experimental mission to test tether-based orbital debris cleanup methods with “Terminator Tape” is slated to launch this fall to test the deorbit performance of two satellites. The Millennium Space Systems mission, called DragRacer, involves two small satellites that are set to launch simultaneously to low Earth orbit (LEO) to measure how fast satellites fall out of space….
Scientists find way to track space junk in daylight
Scientists said Tuesday they had discovered a way to detect space debris even in daylight hours, potentially helping satellites to avoid the ever-growing cloud of junk orbiting the planet. Source: https://phys.org/news/2020-08-scientists-track-space-junk-daylight.html…
Reducing the risk of space debris collision
As humanity expands its horizons beyond the Earth and begins to consider space missions with extended duration, sustainability necessitates the launch of more space vehicles, increasing the risk of collision with existing space debris. One method of clearing this debris involves a tug vehicle dragging it to a safe region. In a new paper published in EPJ Special Topics, authors Antônio…
The fire and the fireball
A bright meteor is called a fireball. This one creates a backdrop to clouds of smoke from an actual fire that – as of Saturday – had burned some 9,000 acres and was only 10% contained, according to Inciweb. Source: https://earthsky.org/todays-image/photo-fireball-bighorn-fire-tuscon-june-2020…
Solving the space junk problem
Space is getting crowded. Aging satellites and space debris crowd low-Earth orbit, and launching new satellites adds to the collision risk. The most effective way to solve the space junk problem, according to a new study, is not to capture debris or deorbit old satellites: it’s an international agreement to charge operators “orbital-use fees” for every satellite put into orbit. Source:…
How Do Astronauts Escape When a Space Launch Goes Wrong?
On May 27, NASA astronauts Bob Behnken and Doug Hurley are expected to become the first humans to ride a Dragon. The two astronauts will catch a ride to the International Space Station in SpaceX’s Crew Dragon capsule as part of the Demo-2 mission, the final test before NASA officially certifies the vehicle for human spaceflight. It will be the first…
Hubble’s impactful life alongside space debris
During its 30 years in orbit around Earth, the NASA/ESA Hubble Space Telescope has witnessed the changing nature of spaceflight as the skies have filled with greater numbers of satellites, the International Space Station was born and in-space crashes and explosions have created clouds of fast-moving space debris. Source: https://phys.org/news/2020-05-hubble-impactful-life-space-debris.html…