The Keck Observatory and NASA’s Hubble Space Telescope may have uncovered a "potential three-body system in the Kuiper Belt," according ... The Cybertruck's First Real Test - And It Didn't ...

With such an orbit, the possible planet could not explain the unusual clustering of Kuiper Belt objects that led to the prediction of Planet Nine. “Whether it is real or not, it is 100 percent ...

At the very edge of our solar system, beyond the grasp of Neptune and even past the icy sprawl of Pluto’s domain, a new ...

The satellites, named after the Kuiper Belt beyond Neptune ... emphasizing the importance of real-world testing. “No matter how the mission unfolds, this is just the start of our journey ...

An international team used 40 years' worth of data from two space probes to track down what they believe are signs of this ...

Researchers say they found a curious dot on infrared images taken 23 years apart that seems to be moving in a manner consistent with a large, distant planet.

The hunt for Planet Nine—the solar system’s ghostly gravitational troll—is longstanding, and is based on the peculiar clustering of rocky bodies in the Kuiper Belt beyond the orbit of Neptune.

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Not many animals have shown an ability to identify and move to a beat -- with humans, parrots and some primates being notable exceptions. But then there’s Ronan, a bright-eyed sea lion that’s caused ...

The mystery of how planets and icy objects formed in the farthest reaches of our solar system just took an exciting turn. A ...