How many dwarf planets are there in our solar system? The recent discovery of 2017 OF201 makes the tally anywhere between ...

If Planet Nine is finally discovered, as one of those who first postulated its existence, does Brown have any suggestions for a possible formal name for this new member of the solar system? “No ...

U.S. astronomers hunting for "Planet Nine" have instead stumbled on what appears to be a new dwarf ... It is also sometimes called Planet X, a name proposed for a hypothetical world beyond ...

Computer simulations show that planets could be flung out of the inner solar system, supporting the possible existence of a ...

Planet Nine is the name given to a proposed planet supposedly lurking near the edge of the solar system. ... A Planet Nine probe would have to travel further than NASA's Voyager 1 space probe.

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.

Artist's impression of Planet Nine – a suspected “wide-orbit” planet – with the Sun in the distance; Neptune's orbit is shown ...

An elusive Earth-like planet in our solar system could finally be discovered within the next few years. Known as Planet Nine or Planet X, it is a hypothetical planet that has long been rumoured to ...

Viewed in this longer context, the previously modern idea of having nine planets, which came about in the 1960s and lasted only until 2006, was a blip on the screen.

As a result, a Planet Nine probe would have to travel around three times faster than Voyager 1 to reach Planet Nine in the researcher's timeframe. This may seem unlikely but it is possible, Lingam ...

U.S. astronomers hunting for "Planet Nine" have instead stumbled on what appears to be a new dwarf planet in the solar system's outer reaches.