প্রকাশ: 31/07/2022
A Chinese rocket fell
back to Earth on Saturday over the Indian Ocean but Nasa said Beijing had not
shared the "specific trajectory information" needed to know where
possible debris might fall.
US Space Command said the Long March 5B rocket
re-entered over the Indian Ocean at approximately 12:45 p.m. EDT Saturday (1645
GMT), but referred questions about "reentry's technical aspects such as
potential debris dispersal impact location" to China.
"All spacefaring nations should follow established best
practices and do their part to share this type of information in advance to
allow reliable predictions of potential debris impact risk," Nasa
Administrator Bill Nelson said. "Doing so is critical to the responsible
use of space and to ensure the safety of people here on Earth."
Social media users in Malaysia posted video of what appeared
to be rocket debris.
Aerospace Corp, a government funded nonprofit research
center near Los Angeles, said it was reckless to allow the rocket's entire
main-core stage – which weighs 22.5 tons (about 48,500 lb) – to return to Earth
in an uncontrolled reentry.
Earlier this week, analysts said the rocket body would
disintegrate as it plunged through the atmosphere but is large enough that
numerous chunks will likely survive a fiery re-entry to rain debris over an
area some 2,000 km (1,240 miles) long by about 70 km (44 miles) wide.
The Chinese Embassy in Washington did not immediately
comment. China said earlier this week it would closely track the debris but
said it posed little risk to anyone on the ground.
The Long March 5B blasted off July 24 to deliver a
laboratory module to the new Chinese space station under construction in orbit,
marking the third flight of China's most powerful rocket since its maiden
launch in 2020.
Fragments of another Chinese Long March 5B landed on the
Ivory Coast in 2020, damaging several buildings in that West African nation,
though no injuries were reported.
By contrast, he said, the United States and most other
space-faring nations generally go to the added expense of designing their
rockets to avoid large, uncontrolled re-entries - an imperative largely
observed since large chunks of the Nasa space station Skylab fell from orbit in
1979 and landed in Australia.
Last year, Nasa and others accused China of being opaque
after the Beijing government kept silent about the estimated debris trajectory
or the reentry window of its last Long March rocket flight in May 2021.
Debris from that flight ended up landing harmlessly in the
Indian Ocean.
- Reuters
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