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.
Telescopes show Earth's sister planet swelling to an apparent diameter wider than Jupiter, while its phase thins dramatically from 37% to 15% lit. Soon after sunset on Feb. 1, direct your ...
Here’s how it works. 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 ...