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

In the cold, distant reaches of the Solar System, far beyond Pluto, astronomers have just identified what could be a new ...

While astronomers continue to search for the mysterious "ninth planet”, a possible giant hidden in the extremities of the ...

A new dwarf planet, discovered beyond Neptune and described as Pluto's 'cousin,' could void the hypothesis of a Planet X in ...

Before 2006 our solar system boasted nine planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto. Then the International Astronomical Union (IAU) laid out its three laws ...

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

So, even without messing up things by adding ... largest comet of all time to stick Pluto in the inner solar system. Leah Crane: Let’s do it. Chelsea Whyte: Yes. Leah Crane: I think we should ...

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

But other than the now-demoted Pluto, no full-fledged planets beyond ... It's really difficult to explain the solar system without Planet Nine. If it exists, Planet Nine is likely around 500 ...

He searched for Planet X from 1905 until his death in 1916, without luck ... upon by spacecraft from Earth, Pluto remained the only one of the solar system’s major worlds that never received ...