Simulations Of Early Solar Systems Find Up To 40 Percent Chance That Planet Nine Exists Wide-orbit planets are fairly common according to the study, and there's a good chance we have one of our own.

In fact, there are several objects out there with even more elongated orbits than Neptune and our outer planets. This is why the existence of Planet Nine has always been such a hot topic among ...

If there were one, that Planet Nine would "nudge the closest part of 2017 OF201's trajectory inward until Neptune flung it out of the solar system." Because 2017 OF201 is there, that could be an ...

But 2017 OF201’s path contrasts with the clustered orbits used to support the existence of Planet Nine. “The orientation seems to be … 90 degrees, probably, of the cluster,” Cheng says.

Last month, a U.S.-based trio hunting the elusive "Planet Nine" said they instead stumbled on what appears to be a new dwarf planet in the solar system's outer reaches.

In the meantime, Cheng said he hasn’t given up searching for Planet Nine. The new discovery, however, may throw a wrench into some long-standing theories of the planet’s existence.

U.S. astronomers hunting for "Planet Nine" have instead stumbled on what appears to be a new dwarf planet in the solar system's outer reaches.

The study, which was published in the "Publications of the Astronomical Society of Australia" journal, doesn't provide concrete proof that Planet Nine exists. However, it's the latest development ...

An artistic concept of the theorized Planet Nine made by Caltech on Jan. 20, 2016. Caltech/AFP via Getty Images Cheng said in the release that 2017OF201 only has about 1% of its orbit visible to us.

Scientists at the Institute for Advanced Study in Princeton, New Jersey, discover a new trans-Neptune Object, 2017OF201, potentially discrediting 2016 theory of Planet Nine.

In our e-mail interview with Cheng, he laid out the repercussions that this could have for the existence of Planet Nine's orbit. "Planet Nine does allow for extreme TNOs to have unclustered orbits ...