What year did she establish Planet 9?
2008
2007
2009
2006
Answer
In 2008, the concept of Planet Nine, a ninth planet in our solar system, was proposed by Caltech astronomers Mike Brown and Konstantin Batygin. The existence of Planet Nine is purely hypothetical, based on mathematical modeling and observations of irregularities in the orbits of objects in the Kuiper Belt. No direct observation or concrete evidence of the planet has been obtained.
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