A 1,300-pound NASA satellite will crash back to Earth in an expected milestone that will bring to an end its 14 years of orbiting our planet.

A more than1,300-pound (600kg) Van Allen Probe spacecraft is expected to re-enter Earth's atmosphere almost 14 years after its launch, Nasa says.

Early analyses predict the 1,323-pound (600-kilogram) vehicle will strike the atmosphere around 7:45 p.m. ET Tuesday, “with an uncertainty of +/- 24 hours,” according to NASA and the US Space Force.