This article was originally published at The Conversation. The publication contributed the article to Space.com's Expert Voices: Op-Ed & Insights. The size of the solar system is defined by the volume ...

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” ...

An artist's illustration imagines the newly discovered Farfarout (lower right), now confirmed to be the most distant object ever observed in our solar system. Farfarout is 132 times the distance of ...

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 ...

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

The small, pink world officially named 2018 VG18 is over than three and a half times more distant from us than Pluto. Eric Mack has been a CNET contributor since 2011. Eric and his family live 100% ...

HONOLULU (NEXSTAR/KHON) — A research team at the University of Hawaii has confirmed that a recently discovered planetoid is almost four times farther from the sun than Pluto, making it the most ...

Need a refresher about 3I/ATLAS? Here's everything to know about the interstellar object, including when the latest observations will be made.