Space Junk from Satellites and Spacecraft Pollutes Earth's Atmosphere, Study Reveals

Researchers from the National Oceanic and Atmospheric Administration (NOAA) have discovered rare elements, including niobium and hafnium, in aerosol particles in Earth's stratosphere. These elements are commonly found in spacecraft manufacturing and are released as metal vapors during reentry into the atmosphere. The study suggests that the number of aerosols linked to space debris could outnumber those produced by meteors, potentially impacting cloud formation and the composition of the stratosphere. While direct health or environmental impacts are unlikely, the researchers warn that the increasing number of satellite launches could lead to a significant increase in trace metals in the stratosphere.