Upon reentry to Earth's atmosphere, spacecraft components and satellites are leaving behind great quantities of metal particles that hang in the air.
A satellite burns while reentering earth's atmosphere. has found widespread metallic particles in the stratosphere, one of the highest layers of the atmosphere, where the ozone layer protects the world from ultraviolet radiation. Researchers say the contaminants are not normally found in such unusual concentrations and likely bled from satellites, rocket components, and other space-faring vehicles as they reentered the atmosphere.
In September 2023 alone, 24 different components returned to Earth, ranging from rocket bodies to debris, according toThe research team measured the stratospheric metals by flying a research jet, a WB-57, to an altitude of 11.8 miles and sampling the air using a nose-mounted device. The scientists also used a similar setup with an ER-2 plane and found, in total, more than 20 metals in ratios mirroring those found in spacecraft alloys.
“What effect that could have on the atmosphere, the ozone layer and life on Earth is yet to be understood,” the statement said.
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