Scientists say a satellite weighing more than one ton will come crashing into earth's atmosphere in the next few days.
The European Space Agency launched the GOCE satellite in 2009 to chart the earth's gravitational field.
The craft is 17 feet long and weighs 2,400 pounds. Experts are keeping a close eye on GOCE to see where it'll come down.
The satellite is expected to break up in the heat of re-entry, but leftover fragments, which could weigh as much as 200 pounds, could pose a serious danger.
The European Space Agency says the satellite should re-enter the atmosphere Sunday, possibly early Monday.
You can Track GOCE on the European Space Agency's Website.