Two years after being discovered and nick-named by a team of astronomers, a planetoid almost four times farther from the Sun than Pluto has been officially confirmed. The confirmation of “Farfarout” ...

Gareth Dorrian does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...

The comet could be older than our solar system. The comet is also distinct because nickel vapor was detected in the gas ...

Astronomers have discovered the most distant object ever found in our solar system. The planetoid — the term for a small chunk of rock or dust or ice orbiting the sun — is appropriately nicknamed ...

It isn't easy to measure the distance of stars. We can't travel to them, counting the miles as we go, nor can we simply say that brighter stars are closer and dimmer ones more distant. Instead, we ...