Will a black hole ever hit Earth?
Scientists have discovered a monster black hole just 1,550 light-years from Earth, the closest one ever found.
Planet Nine Mystery Could Be Caused by a Black Hole Say Scientists
Five years ago scientists proposed the hypothetical existence of a large world tens of millions of miles from the Sun, which has come to be known as "Planet Nine."
Planet Nine Will Be Found by 2030, Scientists Say
Evidence of a ninth planet at the edge of the solar system was announced by Caltech researchers three years ago.
Planet Nine May Not Exist After All, Study Suggests
Scientists have previously predicted the existence of a large planet lurking in the farthest reaches of the Solar System. However, no observational evidence for this world has been found to date.
More Evidence for Hidden Planet at Solar System Edge
2015 TG387 has a weird elongated orbit and appears to be under the influence of a yet-to-be discovered planet.
Scientists Are Angry About 'Planet 9' Because of Pluto
Some researchers think that a hypothetical ninth planet exists in the furthest reaches of the Solar System.
Planet Nine Evidence Grows
In 2016, scientists from the California Institute of Technology found evidence to suggest that a planet larger than Earth could be hiding beyond the orbit of Pluto, out in the furthest reaches of the Solar System.
Doubts Raised Over the Existence of a Ninth Planet
The discovery of a small, icy world is raising questions about the entire prospect of a ninth planet.
Evidence of New 'Planet Nine' Found in Solar System
The planet is believed to be 5,000 times the mass of Pluto.