Jupiter, the solar system’s largest planet, used to be even bigger, according to a new study.
The cloud of gas and dust from which the sun and planets formed dissipated around 4.5 billion years ago. At that time, Jupiter was at least twice its current size, and its magnetic field was about 50 times stronger, researchers found. The findings, which the team described in a study published May 20 in the journal Nature Astronomy, could help scientists develop a clearer picture of the early solar system.
“Our ultimate goal is to understand where we come from, and pinning down the early phases of planet formation is essential to solving the puzzle,” study co-author Konstantin Batygin, a planetary scientist at Caltech, said in a statement. “This brings us closer to understanding how not only Jupiter but the entire solar system took shape.”
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