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How did water appear on Earth?
It is known that the first dark comet was discovered in 2016.
NASA announced the discovery of seven new “dark comets” and brought the total number of this unusual new class of objects to 14, writes Forbes.
It is noted that dark comets are a newly defined type of near-Earth object that lies between an asteroid and a comet.
“Described by planetary scientists as comets and asteroids whose orbits bring them closer to Earth, they resemble asteroids but tend to accelerate unexpectedly, suggesting they may shoot out jets of gas like comets do. However, they do not have a coma around their core They are also dark, making them look like 1I/Oumuamua, an interstellar object…
