February 1, 2016
A Ninth Planet?
Evidence of a new planet right in our own backyard emerges.
Scientists have detected signs of a mysterious giant object traveling around our sun. They think it might be the ninth planet in our solar system. Before this discovery, there were only eight known planets orbiting, or circling, the sun.
Scientists think the object, which they’ve nicknamed Planet Nine, orbits the sun at an average distance of about 450 billion kilometers (280 billion miles). That’s about 20 times farther away than Neptune...