The core booster from China's Long March 5B rocket, delivering the final piece of the Tiangong space station, will crash-land in an uncontrolled reentry.
reenter the atmosphere, they are designed to do so at a particular location, crashing into predetermined parts of the ocean. However, this chunk of Long March 5B is undergoing an uncontrolled reentry, meaning that it could land anywhere.
"Uncontrolled entry means there are no measures in place to ensure the remnants of this large debris object lands in an unpopulated zone. This is because the first stage core of these CZ-5B rockets actually reach orbit, so its reentry point is not able to be controlled," Ralph Cooney, an advanced materials professor at the University of Auckland in New Zealand, toldA stock image shows space junk in orbit around the Earth.
"Therefore, the core stage is currently dead, un-maneuverable and tumbling," they continued."Its motion is only subject to natural forces, such as gravitation and atmospheric drag, the latter causing the progressive loss of mechanical energy leading at the end to a totally uncontrolled reentry. That is, without any possible human intervention."Reentry will be along one of the ground tracks shown here. It is still too early to determine a meaningful debris footprint.
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