A large section of a Long March 5B rocket is predicted to reenter Earth’s atmosphere on May 8 or May 9. Here's what you need to know.

This weekend, a spent, 100-foot-long Chinese rocket is set to plunge through Earth’s atmosphere. A substantial portion of the 22-ton launch vehicle—the core stage of a Long March 5B rocket—will be obliterated as it descends, although large pieces of debris could survive the fall.

Based on the rocket’s trajectory, estimates suggest that reentry will occur sometime between 10 a.m. ET on Saturday May 8 and 11 a.m. on Sunday May 9.

While the precise timing of the rocket’s descent is unknown, and it’s unclear exactly where debris might land, experts say there’s no need to worry.

“If you are standing in the wrong square meter of Earth of the 250 trillion square meters that its debris might hit, then you are in trouble. Otherwise, relax,” astronomer Jonathan McDowell of the Harvard-Smithsonian Institute for Astrophysics, who is keeping a close eye on the object, wrote on Twitter.