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” ...

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 ...

The solar system has a new distance champ. Astronomers just found an object that lies 140 astronomical units (AU) from the sun. That's 140 times the Earth-sun distance, which is about 93 million miles ...

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 ...

Starting with an Earth the size of a marble, these folks built a full-scale model of our solar system across 7 miles of Nevada desert. Anthony Domanico CNET freelancer Anthony Domanico is passionate ...

A small team led by Sihao Cheng, Martin A. and Helen Chooljian Member in the Institute for Advanced Study's School of Natural Sciences, has discovered an extraordinary trans-Neptunian object (TNO), ...

A huge comet that is entering the final stages of a multi-million year journey towards the sun has entered the inner part of our solar system and is due to make its closest pass to Earth in July.