Part of a huge rocket that launched China’s first module for its Tianhe space station is falling back to Earth and could make an uncontrolled re-entry at an unknown landing point, writes The Guardian.

The 30-metre-high core of the Long March 5B rocket launched the “Heavenly Harmony” unmanned core module into low Earth orbit on 29 April from Wenchang in China’s Hainan province.

The Long March 5B then itself entered a temporary orbit, setting the stage for one of the largest ever uncontrolled re-entries. Some experts fear it could land on an inhabited area.

“It’s potentially not good”, - said Jonathan McDowell, Astrophysicist at the Astrophysics Center at Harvard University.

“Last time they launched a Long March 5B rocket they ended up with big long rods of metal flying through the sky and damaging several buildings in the Ivory Coast”, - he said.

“Most of it burned up, but there were these enormous pieces of metal that hit the ground. We are very lucky no one was hurt”.

On Tuesday the core was orbiting Earth around every 90 minutes at about 27,600km/h and an altitude of more than 300km. The US military has named it 2021-035B and its path can be seen on websites including orbit.ing-now.com.