Caltech astronomers have found what they call theoretical evidence of a giant ninth planet in the solar system. The object, called Planet Nine, has an elongated orbit -- much longer than Earth's -- ...
The solar system may have a ninth planet after all. This one is 5,000 times bigger than outcast Pluto and billions of miles farther away, say scientists who presented "good evidence" for a ...
This artistic photo compilation compares the size of Planet Nine (right) to Earth (left). Dr. Konstantin Batygin, professor of Planetary Science at Caltech, made a joke that turned out to be true. In ...
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