The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

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 ...

And could humans ever make the trip? Planet Nine is the name given to a proposed planet supposedly lurking near the edge of ...

Known as Planet Nine or Planet X, it is a hypothetical planet ... It does not have an official name and will not receive one ...

As the shadowy branch of Starfleet Intelligence gets its very own movie, we look back at Section 31's morally dubious history ...