“People have considered a whole host of different orbits for these hypothetical planets,” Trujillo says. “This object being incompatible with one is not [detrimental] to Planet X.

A possible new dwarf planet has been discovered at the edge of our solar system, so far-flung that it takes around 25,000 years to complete one orbit around the sun. The object, known as 2017 ...

PARIS: It's an evocative idea that has long bedevilled 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 have long been on the hunt for "Planet Nine," a hypothetical planet that lies within our solar system just beyond Neptune. Scientific evidence has alternately pointed to and against ...

The small world was found during a search for the hypothetical Planet Nine, and astronomers say the next time it will reach its closest point to the sun is in the year 26186.

If the solar system does have a Planet Nine, it is a world that was bullied by its larger siblings, exiled to the far reaches of space and only rescued from oblivion thanks to the intervention of ...

Now, a newly identified object spotted in two infrared sky surveys has renewed the question of whether the elusive and hypothetical Planet 9 actually exists. According to a new pre-print study ...

(Pluto is considered a Kuiper Belt object.) This hypothetical Planet 9 has never been directly observed and remains theoretical, but in new research uploaded to the preprint site arXiV, scientists ...

Krewe of Oceanus, a northwest Louisiana Mardi Gras krewe, has left the NWLA Mardi Gras Association. Despite a radio report stating otherwise, the krewe has not dissolved and will continue its ...

However, the IAU rejected that name, as it was not the name of an Underworld deity, and had already been suggested for a hypothetical planet orbiting between Mercury ... it flows out of the world ...

The newcomer replacing Pluto presently goes by “Planet Nine.” If and when it finally shows up, it will get the honor of a real name, but so far, the evidence for this hypothetical planet is ...