Almost 20 years after Pluto was infamously downgraded from its status as a planet, scientists now believe they have ...

Scientists have recently spotted a huge object far away in the cold outer reaches of our solar system. This ...

WASHINGTON: A group of scientists has found a strange new object about 435 miles wide at the far edge of the solar system. It ...

Researchers discovered a new trans-Neptunian object, 2017 OF201, potentially a dwarf planet, in the outer solar system.

Learn about the recently discovered trans-Neptunian object that may eventually join Pluto as a dwarf planet, found at the ...

The object’s aphelion the farthest point on the orbit from the Sun is more than 1,600 times that of the Earth’s orbit,” said ...

2017OF201 takes about 25,000 years to orbit the sun ... of this far-off world rests on gravitational patterns in the outer solar system.

Scientists may have found a planet orbiting two brown dwarfs at a wild 90-degree tilt—something never seen before.

In the cold, dark outskirts of planetary systems far beyond the reach of the known planets, mysterious gas giants and ...

A small team led by Sihao Cheng, Martin A. and Helen Chooljian Member in the Institute for Advanced Study's School of Natural ...

The small world was found during a search for the hypothetical Planet Nine, and astronomers say the next time it will reach ...

Discovery of 2017OF201, a large trans-Neptune Object, challenges previous beliefs about the Kuiper Belt and hints at the existence of a theoretical Planet Nine.