Astronomers have uncovered a massive new trans-Neptunian object, 2017 OF201, lurking at the edge of our solar system. With an ...

A new trans-Neptunian object, 2017 OF201, has been found with a vast orbit and potential dwarf planet size. The finding hints ...

The solar system lost its ninth planet back when Pluto was demoted to a dwarf planet, but research might indicate that there ...

The solar system's main asteroid belt may have taken its shape when three gas giant planets were flung into more distant orbits, scattering the remote, icy objects that were lurking at the solar ...

Astronomers say they have evidence that there may be a hidden planet in our Solar System. Named 'Planet Y', the Earth-sized ...

Today, let's talk about a super mysterious celestial body in the solar system - Sedna. Did you know that Sedna takes about 11 ...

The origin of the differing tilts in the orbits of the planets in our solar system may have been revealed through the ...

The James Webb Space Telescope, the most powerful space telescope ever built, has picked up highly unusual readings from an ...

New discoveries of objects in the Kuiper Belt have also presented challenges for the Planet Nine theory. The latest is known ...

All solar system planets circle our sun with slightly tilted orbits — and a new study shows even distant planetary systems in quiet neighborhoods have orbital tilts, too.

A hypothetical Kuiper Belt Planet in the outer solar system could help explain the orbits of trans-Neptunian objects.

Today, let's talk about an extremely mysterious celestial body in the solar system — Sedna. Did you know that it takes Sedna ...