Scientists Are Racing to Reach a Mysterious World Before It Disappears for 11,000 Years
Artist’s impression of Sedna. Credit: NASA/JPL-Caltech It moves through the darkness on a path so long that humans…
Experimental Propulsion Tech Could Reach Mysterious Planet Beyond Pluto in 10 Years
On November 14, 2003, astronomers spotted what was at the time the most distant known object orbiting the…