For almost a decade, astronomers have been searching for a ninth planet in the solar system. Recently, new evidence of ...

A new study has proposed the existence of Planet Y, an alternative Planet Nine candidate that is smaller and closer to Earth ...

A recent study by Princeton University astronomers suggests the possible existence of a previously undetected planet in our ...

In an exciting breakthrough in planetary science, a recent study has increased the likelihood of Planet Nine’s existence by up to 40%. This planet, also referred to as Planet X, has remained an ...

A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and ...

It's an evocative idea that has long bedeviled scientists: a huge and mysterious planet is lurking in the darkness at the edge of our solar system, evading all our efforts to spot it. Some astronomers ...

If the object really is Planet Nine, it would be larger than Neptune and exist 700 times further from the sun than Earth. The best candidate yet for the elusive Planet Nine has been spotted in two ...

Scientists may have discovered a dwarf planet far beyond Neptune — an unearthing that may disprove a longstanding theory about the possibility of a giant ninth planet. The dwarf planet's existence ...

A team of scientists at the Institute for Advanced Study School of Natural Sciences in Princeton, New Jersey, might have found a new dwarf planet, potentially leading to more evidence of a theoretical ...

A possible cousin of Pluto seems to be circling the far reaches of the solar system. The dwarf planet candidate 2017 OF201 travels in a superwide orbit, with the sun relatively near one end of its ...

Rogue planet Cha 1107-7626 is swallowing gas and dust at roughly six billion tons each second, the fastest planetary growth ...