A team, including an astronomer from the University of Hawaii Institute for Astronomy (IfA), have confirmed a planetoid that is almost four times farther from the Sun than Pluto, making it the most ...

Astronomers discovered a planetoid orbiting the sun further than any known object in the solar system. Called "Farfarout," the object orbits the sun every 1,000 years. Objects like Farfarout could ...

The transits of Venus in 1761 and 1769 offered a way to calculate the true size of the Solar System. Getting to the right ...

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 ...

Illustration comparing the planets of the Solar System and the Sun on the same scale. The planets are shown to scale relative to each other but their distances are not. From left to right the bodies ...