Jupiter's southern hemisphere photographed by NASA's Juno spacecraft. Image: NASA/JPL-Caltech/SwRI/MSSS/GeraldEichstaedt/Sean Doran
How Jupiter grew so big - space science news

Mathematical modelling reveals that Jupiter has known three distinct phases of growth. During the first phase, the embryo-planet accreted small, centimeter-sized pebbles and grew quickly for one million years. The following two million years, the planet grew slower by accretion of larger, kilometer-sized rocks to 50 Earth masses. Finally, Jupiter grew really big, to the size we know today of 300 Earth masses, by accumulation gas. This model is in agreement with a previous analysis of meteorite data, and explains why Jupiter grew so surprisingly slow in the second phase.

Read the full story: University of Bern
Scientific publication: Nature Astronomy