美国航天局的Van Allen Probe A定于2026年3月10日重新进入地球大气层, NASA's Van Allen Probe A is set to reenter Earth's atmosphere on March 10, 2026, with most of it burning up and a low risk of debris harming anyone.

美国航天局2012年为研究地球辐射带而发射的Van Allen Probe A预计于2026年3月10日下午7时45分左右重新进入大气层。 NASA’s Van Allen Probe A, launched in 2012 to study Earth’s radiation belts, is expected to reenter the atmosphere on March 10, 2026, around 7:45 p.m. ET,在轨道运行14年后。 ET, after 14 years in orbit. 2019年拆除的1 323磅卫星,由于太阳活动产生的大气阻力增加,其下降速度快于计划。 The 1,323-pound satellite, deactivated in 2019, is descending faster than planned due to increased atmospheric drag from solar activity. 它大部分会在重返时燃烧,尽管有些碎片可能存活下来。 Most of it will burn up during reentry, though some fragments may survive. 美国航天局正在用一个24小时的不确定窗口跟踪这一事件。 The U.S. Space Force is tracking the event, with a 24-hour uncertainty window. 美国航天局估计,碎片伤害一个人的机率是4,200分之一,由于地球的海洋覆盖,这一风险被认为非常低。 NASA estimates a 1 in 4,200 chance of debris harming someone, a risk considered very low due to Earth’s ocean coverage. Probe B预计要到2030年代才会再次进入。 Probe B is not expected to reenter until the 2030s.