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 ...

Chauncey grew up on a farm in rural northern California. At 18 he ran away and saw the world with a backpack and a credit card, discovering that the true value of any point or mile is the experience ...

The location of the solar system's outer boundary is a point of contention among astronomers. There are three possible candidates, which "all have merit." But which one is best? When you purchase ...

This story appears in the July 2013 issue of National Geographic magazine. The dust speck had been plucked from the tail of a comet more than 200 million miles away. Now, under an electron microscope ...

Lunar System — from Tesla’s former head of energy — is a solar energy backup system with modular battery units that can power your whole home. It might even make you some money... eventually. is a ...

A newly discovered object speeding through our solar system is sparking excitement among astronomers because it’s not from around here. Believed to be a comet, the object is only the third celestial ...

The search for an unknown planet in our solar system has inspired astronomers for more than a century. Now, a recent study suggests a potential new candidate, which the paper’s authors have dubbed ...