Ozone
A SpaceX Falcon 9 rocket stage re-entered the atmosphere uncontrollably in February 2025, releasing vaporised metals that drifted over Europe. Researchers detected a significant spike in lithium from the debris, marking the first tracing of such pollution to a specific spacecraft. This incident highlights growing concerns over atmospheric impacts from increasing satellite launches.
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Researchers have observed a dramatic buildup of ozone inside Mars' north polar vortex, where extreme cold and darkness freeze out water vapor. This phenomenon, detected using data from ESA and NASA orbiters, offers insights into the planet's ancient atmospheric chemistry and potential habitability. The findings were presented at a joint meeting in Helsinki.