NASA’s Neil Gehrels Swift Observatory, which has spent two decades studying the most powerful explosions in the cosmos, is expected to re-enter Earth’s atmosphere on Wednesday, burning up in the process. The satellite, which was designed to operate with its three telescopes for only two years, can no longer steer or observe, and its re-entry is uncontrolled. ET on November 4. NASA says most of the spacecraft will burn up, but some components are expected to survive. “The re-entry locations of any surviving components may vary from hemisphere to hemisphere and depend on when it re-enters,” the agency said in a blog post, adding that surviving fragments are limited to between 20.6 degrees south latitude and 20.6 degrees north latitude. The agency added: “The risk of harm to anyone on Earth is unlikely: approximately 1 in 2,100. NASA and the Space Force will continue to monitor re-entry and update predictions.” The observatory was launched in 2004 to explore the most powerful explosions in the universe, called cosmic gamma-ray bursts, and quickly return their observations of location and strength to Earth. the big bang NASA says these bursts of energy occur about once a day and are brief, but intense, flashes of gamma radiation that come from all different directions and can last from a few milliseconds to a few hundred seconds. But scientists don’t know what causes them; They theorize that they may be the birth of a black hole in a massive stellar explosion or produced by the collision of two neutron stars, or some other phenomenon. Swift was launched as part of NASA’s Media Explorer, or Midex, program. In July, he observed a wandering megablack hole crusher star, which occurs when a star fatally passes close to a supermassive black hole. “Crumbs of the splintered star heat up as they spin around the black hole, creating a glow that astronomers can see from afar across the cosmos, and the black hole launches a relativistic jet into space,” the agency said. The black hole, described as “orphan,” lit up as it devoured the star on the outskirts of a galaxy, in what scientists call a “tidal disruption event.” Almost all galaxies have a supermassive black hole at their center, and a tidal disturbance occurs about once every 100,000 years. The starburst event occurred 2,600 light-years from the center of the host galaxy, but Swift’s team observed one more than 30,000 light-years away. “We were looking for these star destruction events as a way to find otherwise invisible supermassive black holes moving away from the galactic nuclei where they typically reside,” Robert Stein, a researcher at the University of Maryland, College Park and NASA’s Goddard Space Flight Center in Greenbelt, Maryland, said at the time. the light of about 10 billion suns.” How the black hole came to be drifting is still unknown until now. Stein said it could have started in a small galaxy that merged with the big one, but the key question was how common wandering black holes are. NASA tried to push Swift into a higher orbit last year using a private space contractor, but the mission was unsuccessful after they failed to find each other. Last month, Swift was estimated to be orbiting 171 miles above Earth and was ordered it to end operations to prepare for re-entry. NASA said Swift has “expanded our understanding of a wide variety of cosmic objects and events, from active galaxies powered by supermassive black holes and stars undergoing X-ray flares, to supernova explosions and comets and asteroids in our own solar system.”
