Astronomers have long speculated about an unseen planet lurking in the solar system's outer edge. This hypothetical world, dubbed Planet Nine, could explain the unusual clustering ...

Now, an international team of researchers have made a new detection that they say could be a sign of ... the unusually clustered orbits of some of the objects there, including the dwarf planet Sedna, ...

Now, an international team of researchers have made a new detection that they say could ... including the dwarf planet Sedna, can be conveniently explained by the existence of a stealthy world ...

Why a ninth planet has been suspected all along Far beyond Neptune lies the Kuiper Belt, a ring of icy leftovers from the Solar System’s early days.Several of those objects, including the dwarf ...

The first-ever direct flights from the United States to Greenland will give tourists easier access to the island’s history, ...

Now, a new study digs into decades-old infrared maps ... Several of those objects, including the dwarf planet Sedna, follow orbits that cluster in one sector of space instead of being spread ...

The discovery of 2017 OF201 is significant, as it challenges the hypothesis of Planet Nine, a hypothetical planet thought to exist in the outer Solar System.

There’s a new frozen oddball orbiting the Sun, and it’s not your average space rock. It’s a planet—a minor one, to be ...

Astronomers have announced the discovery of a new dwarf planet in our solar system, named 2017 OF201. Located far beyond ...

In April, astronomers said they had detected a possible signature of life on the exoplanet K2-18b. Now, three independent ...