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Astronomers have detected three new rocky bodies that share the same orbit as Neptune as it travels around the sun.
The finding brings the total number of the gas giant’s asteroid companions, or "Trojans," up to four.
The highly inclined orbit of one of them supports the hypothesis that the Neptune Trojans were captured from a much larger asteroid "cloud" that surrounds the planet, and that they are not the broken remains of some larger object, as some scientists have speculated.

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