Reference Explore the eight (or nine) planets of the solar system in order from nearest to the sun and discover the many wonders of our solar system along the way. An object seen to have moved in the ...

This range aligns with theoretical predictions for Planet Nine’s distance and mass, estimated between 7 and 17 times that of Earth . The researchers initially identified 13 candidate pairs showing the ...

This is probably the most convincing evidence for Planet Nine so far. It is believed that this planet is five to ten times ...

Astronomers may have found a candidate for Planet Nine. This planet is beyond Neptune. The finding could be the first ...

The possibility that an additional planet may be hidden far into the solar system was touted more than a century ago. In 1983 ...

The ongoing search for an additional planet at the solar system's edge has identified a new candidate, potentially ...

Using two infrared space telescopes and a 23-year gap, scientists may have spotted a mysterious, slow-moving object beyond ...

The presence of another planet in the solar system could explain the odd movements of some of the bodies in the Kuiper Belt.

An object seen to have moved in the time between when it was imaged by the IRAS and AKARI surveys in 1983 and 2006 ...

An international team used 40 years' worth of data from two space probes to track down what they believe are signs of this ...