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Astronomers have discovered an object at the edge of the solar system that is locked in a strange rhythmic dance with the ice giant Neptune.
Astronomers have discovered a "fossil" world lying in the outskirts of the solar system, according to new research.
For the first time, international researchers have pinpointed the moment when planets began to form around a star beyond the ...
"It is possible that a planet once existed in the solar system but was later ejected, causing the unusual orbits we see today ...
Just the third-ever confirmed interstellar object has been detected in our solar system. Here's what we know. (Spoiler: It's not aliens.) ...