Jupiter designed the solar system. Heres what the planet was like as a child.

Jupiter, the largest planet orbiting the sun, used to be much bigger and stronger when the solar system was just beginning to take shape, a pair of astronomers say. 

Two scientists at Caltech and the University of Michigan suggest that early Jupiter was at least double its contemporary size. The primitive version of the gas giant could have held some 8,000 Earths within it, said Konstantin Batygin, lead author of the new study.  

What's more, young Jupiter probably had a magnetic field 50 times more powerful.