Just when you thought you knew all the worlds in the solar system, astronomers go and discover a new object that could rewrite the space map.
This icy world, temporarily named 2017 OF201, could be a distant cousin of Pluto — and scientists mean “distant” quite literally. At its farthest point, it’s more than 1,600 times the distance of Earth from the sun. At its closest, it’s still 44.5 times farther than Earth.
What makes 2017 OF201 stand out is its very stretched-out path around the sun, which takes an incredible 25,000 Earth-years to complete. For comparison, Pluto makes a lap around the sun every 248 Earth-years.
How this world got to the edge of the solar system is a mystery — perhaps the result of close encounters with a giant planet like Jupiter or Neptune that tossed it out into a wide orbit. Or maybe when it was originally ejected, it ended up in the so-called Oort Cloud before returning. The Oort Cloud is thought to be a sphere of ancient, icy objects surrounding the solar system. NASA says the cloud remains a theory because the comets there have been too faint and distant to be directly observed.
Support authors and subscribe to content
This is premium stuff. Subscribe to read the entire article.
