Unique because it's the first time scientists have discovered what may be two planets sharing the same orbit of their home sun, New Scientist reports.
If this dual-orbiting planet hypothesis gets confirmed, researchers suggest it would lend credence to a theory that our moon was created when a planet-sized object, sharing a similar orbit to Earth's eons ago, possibly crashed into our home world.
"Systems like this are not common, as this is the only one we have seen," said Jack Lissauer, a space scientist at NASA's Ames Research Center in Moffett Field, Calif.
The double-planetary system, dubbed KOI-730, is described in greater detail by Lissauer and his colleagues in the Astrophysical Journal.
"Several considerations strongly suggest that the vast majority of these multi-candidate systems are true planetary systems."
A big question scientists now wonder about the KOI-730 planets is whether they're headed for a runaway collision that could result in the formation of a moon.
But, in the galactic scheme of things, these two potential planets will most likely continue their cosmic close dance with each other for at least another 2 million years.
Read more at New Scientist and the Astrophysical Journal.
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