Add Yahoo as a preferred source to see more of our stories on Google. Scientists think there may be a ninth planet hiding in the distant reaches of the solar system — and a new telescope could finally ...

For years, the existence of a missing Planet 9 has been one of the predominate theories attempting to explain some of the eccentric orbits found in the outer Solar System. But so far, no such planet ...

Journey to Sedna, a distant red dwarf planet with an 11,400-year orbit. Explore its icy surface, enigmatic orbit, and possible connections to other hidden worlds. Understand why Sedna challenges ...

Sedna will make its closest approach to the Sun in 2076, giving us a rare opportunity to visit the planetoid before it drifts off for thousands of years. Reading time 3 minutes On November 14, 2003, ...

James is a published author with multiple pop-history and science books to his name. He specializes in history, space, strange science, and anything out of the ordinary.View full profile James is a ...

The camera resting in an impeccably clean, lint-free room at the SLAC National Accelerator Laboratory in Menlo Park, California, resembles an extremely oversized version of the SLR lenses for Nikon or ...

Sedna is drifting into a part of its path where human technology can finally contemplate catching up, and that window will not reopen for roughly the span of recorded civilization. Its 11,400 year ...