A massive Chinese rocket is expected to make an uncontrolled re-entry to Earth this week — and experts have no clue yet where its remnants will land. The roughly 100-foot-tall core of the Long March 5B rocket launched the 22.5-ton “Heavenly Harmony” unmanned Tianhe space station module from Wenchang in Hainan province on Thursday, the Guardian reported. Tianhe soon separated from the launcher and entered its planned initial orbit — but the core stage is likely to make an uncontrolled re-entry amid the thickening atmosphere, SpaceNews reported. “It’s potentially not good,” Jonathan McDowell, an astrophysicist at the Astrophysics Center at...