Researchers claim that there could be at least 1 million interstellar objects hiding in the Oort Cloud at the edge of our ...

New simulations reveal that around 1 million "macroscopic" objects from our closest stellar neighbors, the Alpha Centauri system, may already reside in the Oort Cloud, far from sight.

James Unwin: If we do do our searches and it turns out that there is a planet in the outer solar system, this would be an absolutely incredible discovery. Such a strange planet on such an odd orbit.

A planet-size object that possibly once visited the solar system may have permanently changed our cosmic neighborhood by warping the orbits of the four outer planets, a new study suggests.

And that is always a moving experience.” Brown is still busy investigating the outer solar system, but he managed to tear himself away to discuss the next big mysteries in our corner of the ...

Asteroids that orbit close to the Earth inevitably cause us some anxiety due to the even remote possibility of a collision. But their proximity also offers ample opportunities to learn more about the ...