Mysterious New World Discovered Beyond Pluto by Scientists

Just when you thought you had a comprehensive understanding of all the worlds in our solar system, astronomers have made an astonishing discovery that could dramatically alter our space map. This newly identified icy entity, provisionally named 2017 OF201, may very well be a distant relative of Pluto — and when scientists say “distant,” they mean it in every sense. At its most remote point, it exists over 1,600 times farther from the sun than Earth. Even at its nearest approach, it remains 44.5 times more distant than our planet.

The unique characteristic that sets 2017 OF201 apart is its extraordinarily elongated orbital path around the sun, which requires an astonishing 25,000 Earth-years to complete. In comparison, Pluto manages to orbit the sun every 248 Earth-years. This significant difference in orbital period highlights the unusual nature of this celestial body.

The origins of how this intriguing world came to inhabit the outer regions of the solar system remain enigmatic. It may have been influenced by close encounters with a massive planet like Jupiter or Neptune, which could have flung it outward into its wide orbit. Alternatively, it might have been initially expelled into the Oort Cloud — a theorized spherical shell of ancient, icy objects enveloping the solar system — before finding its way back into the inner solar system. According to NASA, the Oort Cloud is still a concept awaiting direct observation since the comets within it are too faint and distant to study directly.

On May 21, the International Astronomical Union’s Minor Planet Center, responsible for cataloging new moons and other small celestial bodies in the solar system, officially announced the groundbreaking discovery. Measuring approximately 435 miles in width, 2017 OF201 has the potential to be classified as a dwarf planet, similar to the designation Pluto has held since its reclassification from the status of the ninth planet in 2006.

“Despite the remarkable advancements in telescopes that enable us to explore the far reaches of the universe,” remarked Sihao Cheng, a researcher from the Institute for Advanced Study who spearheaded the discovery, in a statement, “there remains a vast amount still to uncover about our own solar system.”

Sihao Cheng, along with graduate students from Princeton University, discovered the potential dwarf planet while investigating the possibility of a hypothetical “Planet 9,” a concealed world whose gravitational influence could be responsible for the peculiar clustering of distant objects beyond Neptune.

The research team utilized advanced computer programs to sift through years of astronomical images captured by the Victor M. Blanco Telescope in Chile and the Canada France Hawaii Telescope. By identifying bright spots that appeared to move slowly across the night sky, they successfully pinpointed the location of 2017 OF201.

These are the current orbits of Pluto, Neptune, and 2017 OF201.
Credit: Jiaxuan Li / Sihao Cheng infographic

However, 2017 OF201 stands out as an anomaly because it does not conform to the clustering trends observed among other trans-Neptunian objects. “The existence of 2017 OF201 might imply that the hypothesized Planet 9 or Planet X does not exist,” stated Jiaxuan Li, one of the collaborators, on his personal website. Their research is currently accessible on the arXiv preprint server.

This significant discovery also calls into question many scientists’ assumptions regarding the outer solar system. The region beyond the Kuiper Belt, where 2017 OF201 is located, has long been perceived as relatively empty. The NASA New Horizons spacecraft, which captured stunning images of Pluto and its moons in 2015, has since traveled far beyond that point, yet it surprisingly has not yet reached the boundary of the Kuiper Belt.

This could indicate that the spacecraft will need to traverse billions of additional miles before finally reaching interstellar space, an area no longer impacted by the sun‘s radiation and particle emissions. In 2019, New Horizons captured images of a distant icy object, named Arrokoth, which is the farthest object ever encountered by a spacecraft.

If 2017 OF201 only remains within detectable range for a mere 1 percent of its lengthy orbit, this suggests that there could be many more objects beyond the Kuiper Belt that have yet to be discovered. “The existence of this solitary object implies that there may be another hundred or so objects of similar orbital characteristics and size,” said Cheng. “They are simply too far away for current detection methods.”