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Space debris (also known as space junk, space pollution, [1] space waste, space trash, space garbage, or cosmic debris [2]) are defunct human-made objects in space – principally in Earth orbit – which no longer serve a useful function.
Such a result could happen even with robust space pollution controls, as a lone malicious actor on a planet could cause a Kessler syndrome scenario. [30] Humanity could be on the path to a similar fate, soon to trap itself on Earth with no future as a spacefaring civilization. [ 31 ]
Particulate pollution is pollution of an environment that consists of particles suspended in some medium. There are three primary forms: atmospheric particulate matter, [1] marine debris, [2] and space debris. [3] Some particles are released directly from a specific source, while others form in chemical reactions in the atmosphere.
The rapid increase in satellites and space junk will make low Earth orbit unusable unless companies and countries cooperate and share the data needed to manage that most accessible region of space ...
Further contrary to popular belief, the Great Pacific Garbage Patch cannot be seen from space. [ 61 ] [ 62 ] In a 2001 study, researchers [ 63 ] found concentrations of plastic particles at 334,721 pieces per square kilometre (866,920/sq mi) with a mean mass of 5.1 kilograms per square kilometre (29 lb/sq mi), in the neuston.
A practical definition of water pollution is: "Water pollution is the addition of substances or energy forms that directly or indirectly alter the nature of the water body in such a manner that negatively affects its legitimate uses." [1]: 6 Water is typically referred to as polluted when it is impaired by anthropogenic contaminants.
An image shows the comet 67P/Churyumov-Gerasimenko in March 2015. New research from NASA says Jupiter-family comets like this one could have been potential sources of water for early Earth ...
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