Jupiter was once twice its size. Then it shrank
SMRTR summary
Jupiter was once more than twice its current size, with a magnetic field 50 times stronger, according to a new study of its smallest moons. This discovery provides insights into the planet's formation and its role in shaping our solar system. Researchers analyzed the orbits of Almathea and Thebe to estimate Jupiter's early size and structure, revealing its significant shrinkage over time due to cooling and gravitational compression.
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