At the edge of our solar system supposedly lies an immense planet. Five to ten times the size of the Earth. Several international teams of scientists have been competing in a frantic race to detect it, in uncharted territories, far beyond Neptune. The recent discovery of several dwarf planets, with intriguing trajectories, have put astronomers on the trail of this mysterious planet. Why is this enigmatic planet so difficult to detect? What would a ninth planet teach us about our corner of the universe? Could it help us unlock some of the mysteries of our solar system?

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Documentary about the Griffith Observatory, shown at their Leonard Nimoy Event Horizon Theater

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To help visualize the dramatic final chapter in Cassini's remarkable story, NASA's Jet Propulsion La...

CERN and the University of California-Santa Barbara are collaborating in the search for the elusive ...

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Discovered about twenty years ago, the immense masses of water vapor that fly over the Amazon, calle...

Chaco Canyon, located in northwest New Mexico, is perhaps the only site in the world constructed in ...