Space junk

MethaneSAT satellite. Illustration courtesy of the Environmental Defense Fund (EDF)

Jeff Bezos' climate change monitoring satellite shuts down – and becomes space junk

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MethaneSAT, the first environmental satellite operated by a civic organization, shuts down after 15 months of operation. Researchers: "The information collected has already changed the rules of the game in monitoring methane emissions"
In the Bolides. Illustration: depositphotos.com

Supersonic booms in the sky: How scientists are using bolides to improve planetary defense

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Researchers show that bolides – meteoroids that explode in the atmosphere – create sound waves that can be analyzed for warning purposes about space debris and other astronomical threats
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