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Astronomers Finally Know How Old Jupiter Is

Astronomers have finally figure out how old Jupiter is. According to a recent study, the gas giant’s main core had already grown to be 20 times more massive than Earth just 1 million years after the sun formed. Lead author of this study, Thomas Kruijer, of the University of Munster in Germany and Lawrence Livermore National Laboratory in California, said in a statement:

“Jupiter is the oldest planet of the solar system, and its solid core formed well before the solar nebula gas dissipated, consistent with the core-accretion model for giant planet formation,”ž