Space science
The Solar System is far more complex than we think.
As the only highly intelligent life form in the Solar System, humans have existed on Earth for 5 million years.
Planet 9
Browse ScienceInfo articles and explainers related to Planet 9.
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Articles about Planet 9
4 published items.
Space science
'Planet 9' left its mark on Earth before disappearing?
A mysterious planet may have approached the early Sun at a distance slightly farther than Uranus and rearranged everything in the star system.
Space science
Shocking theory: The mysterious 9th planet in the Solar System could be a black hole
Some astronomers have just hypothesized that the mysterious 9th planet in the Solar System may not be a planet, but actually a primitive black hole.
Space science
The dark energy tracing project will help find the 9th planet
The Dark Energy Survey Project helps to shorten the search time and planet X can be accurately located at the end of this summer.