• By The Financial District

U.S. ASTROPHYSICIST RAPS CHINA FOR UNCONTROLLED ROCKET REENTRY

Remnants of a large Chinese rocket launched last week are expected to plunge back through the atmosphere this weekend in an uncontrolled re-entry being tracked by US Space Command, the military said on Wednesday (Thursday, May 6, 2021, in Manila).

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The Long March 5B rocket blasted off from China’s Hainan island on April 29 carrying the Tianhe module, which contains what will become living quarters for three crew on a permanent Chinese space station.


The Tianhe launch was the first of 11 missions needed to complete the station. The rocket's exact point of descent into Earth's atmosphere as it falls back from space "cannot be pinpointed until within hours of its reentry," which is projected to occur around May 8, Space Command said in a statement posted online, Steve Gorman reported for Reuters.


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Harvard-based astrophysicist Jonathan McDowell said potentially dangerous debris will likely escape incineration after streaking through the atmosphere at hypersonic speed but in all likelihood would fall into the sea, given that 70% of the world is covered by ocean.


There is a chance that pieces of the rocket could come down over land, perhaps in a populated area, as in May 2020, when pieces from another Chinese Long March 5B rocket rained down on the Ivory Coast, damaging several buildings, though no injuries were reported, McDowell told Reuters.


McDowell, a member of the Harvard-Smithsonian Center for Astrophysics, said the rocket's main stage core, believed to weigh about 21 tons, would likely break into a shower of debris equivalent to that of a small plane crash and come down in a narrow trail stretching about 100 miles.


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Based on its current orbit, the debris trail is likely to fall somewhere as far north as New York, Madrid or Beijing and as far south as southern Chile and Wellington, New Zealand, or anywhere in between, McDowell said.


He said most countries have sought to design spacecraft in such a way as to avoid large, uncontrolled re-entries, since large chunks of the NASA space station Skylab fell from orbit in July 1979 and landed in Australia.


“It makes the Chinese rocket designers look lazy that they didn’t address this,” he said, calling the situation “negligent.”



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