A large planet that was ejected from its own solar system is a possible candidate. In the paper, the researchers say that the estimate that this theory has about a 1 in 100 chance of being correct.

Discover the order of planets in the solar system. From Mercury to Neptune, explore our solar system and learn more about our cosmic home.

It tells the exact position of every object in the solar system. They found that alien stars can make the solar system about 50 per cent less stable in the next 5 billion years. There is a 3.9 per ...

The long-theorized Planet 9, which astronomers have speculated could be a Neptune-sized planet that has been lurking on the outer edge of the solar system, could explain the unusual clustering and ...

Currently, our solar system recognizes 8 planets, with Pluto being demoted to a dwarf planet floating in the Kuiper Belt in 2006. Planet Nine's gravitational pull may explain what keeps the icy ...

A new look through decades-old data has unveiled some of the most compelling evidence yet of a hidden ninth planet in the far reaches of our solar system, far beyond ...

Jupiter is already the biggest planet by far in our solar system, but new research suggests it was somehow once even larger than it is now.. Twice as large, in fact. To put that into context ...

A 9th planet in our solar system might be found — and no, it’s not Pluto. Is there another planet out there? Researchers say they have hints of a new candidate. Julia Musto. in New York.

Astronomers have discovered that the Jupiter, the largest planet in our Solar System, was once so big that it could have held 2,000 Earths. Jupiter is our system's oldest planet, forming from the ...