A giant NASA satellite, part of a twin probe mission launched in 2012 to study the Van Allen radiation belt, is expected to re-enter Earth's atmosphere on Tuesday evening. Weighing approximately 1,323 pounds (600 kg), the satellite's return is estimated for around 7:45 PM EDT, with predictions indicating that most of the craft will burn up upon re-entry. However, some components are anticipated to survive the descent, leading to a calculated risk of 1 in 4,200 that someone on the ground could be struck by debris.

The US military’s Space Force is closely monitoring the situation and has advised that while the chance of injury from the satellite's debris is minimal, there is still a need for caution. They noted that the predictions involve a degree of uncertainty, with a possible variation in timing of around 24 hours. Historically, debris re-entering Earth's atmosphere is not a rare phenomenon; reports indicate that about 5,400 tons of materials have survived re-entry over the past four decades, though such incidents rarely result in injuries to people.

In their statement, NASA and the Space Force emphasized their ongoing commitment to tracking the satellite's re-entry and updating predictions as new data becomes available. As the satellite prepares to fall, there is a mix of scientific interest in its re-entry and public concern about the risks posed by falling objects from space, underlining the balance of space exploration and safety on Earth.