NASA Satellite to Fall Back to Earth, With a Small Risk of Debris A defunct NASA satellite launched 14 years ago to study Earth’s radiation belts is set to re-enter the planet’s atmosphere on Tuesday evening. The Van Allen Probe A, a 1,323-pound spacecraft, is expected to plunge through the atmosphere at approximately 7:45 p.m. EDT, according to predictions from the U.S. Space Force. The re-entry will be uncontrolled, meaning NASA has no ability to steer the probe. While most of the satellite is expected to burn up during its descent, some components may survive the fiery journey. NASA stated the risk of harm to anyone on Earth is low, approximately 1 in 4,200. The agency and the Space Force will continue to monitor the event and update predictions as needed. Uncontrolled re-entries of defunct satellites, spent rocket parts, and space debris are common occurrences. The European Space Agency notes these objects re-enter Earth’s atmosphere almost daily. While most debris burns up harmlessly, some parts can reach the surface. However, the likelihood of space debris landing on land is rare due to the planet’s vast oceans, which cover about 71% of Earth’s surface. Predicting the exact time and location of such re-entries is challenging due to factors like atmospheric dynamics, space weather, and the satellite’s orbital decay. The Space Force’s forecast for the Van Allen Probe A’s re-entry includes an uncertainty of plus or minus 24 hours. The Van Allen Probe A and its twin, Van Allen Probe B, were launched on August 30, 2012, to study Earth’s radiation belts. These belts, known as the Van Allen belts, are doughnut-shaped zones of high-energy radiation trapped by Earth’s magnetic field. They shield the planet from solar storms, cosmic radiation, and solar wind.#nasa #international_space_station #van_allen_probe_a #us_space_force #van_allen_belts
NASA spacecraft makes an uncontrolled plunge back to Earth A large space probe plummeted into Earth’s atmosphere early Wednesday, years earlier than expected. The spacecraft, known as Van Allen Probe A, was launched by NASA in 2012 to study the Van Allen radiation belts—two cosmic bands of high-energy particles trapped in Earth’s magnetic field. After operating for over seven years, the probe’s mission ended in 2019 when it ran out of fuel. Now, it has reentered Earth’s atmosphere, with NASA estimating that a few components could have survived the fiery descent. The reentry occurred near the equatorial Pacific, south of Mexico and west of Ecuador, at 6:37 a.m. ET. While most of the spacecraft was expected to disintegrate during reentry, NASA noted that the risk of debris harming a person was estimated at about 1 in 4,200. This is lower than the odds of past space debris incidents, such as the 2018 reentry of China’s space station, which had a chance of less than 1 in a trillion of causing harm. Dr. Darren McKnight, a senior technical fellow at space-tracking company LeoLabs, described the current risk as “not a horrible day for mankind,” emphasizing that such probabilities have improved over time. However, the event highlights the ongoing challenges of managing space debris. NASA’s policies require that spacecraft launched by the U.S. reenter or be safely disposed of within 25 years of their mission’s end. For the Van Allen Probes, the plan was to allow them to burn up in the atmosphere as they fell back to Earth. Mission planners had initially predicted the spacecraft would reenter in 2034, but the actual timeline was accelerated due to the solar cycle’s intensity.#nasa #international_space_station #space_x #van_allen_probe_a #leo_labs
