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A near-Earth asteroid known as Kamo‘oalewa might be made of a stray chunk of the Moon, scientists have said.
Kamo‘oalewa is one of a mysterious and little-understood set of objects called quasi-satellites. It is an asteroid that orbits around the Sun but remains close to the Earth.
As with all objects of that type, Kamo‘oalewa is difficult to observe. Though it is relatively close to the Earth – it comes as close as 9 million mile away – it is also very faint, about 4 million times darker than the faintest star humans can see in the sky.
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