A new scientific paper reckons the gas giant absorbed a number of 'planetesimals' on its journey to become the biggest planet in the solar system.
Juno was however able to measure variations in gravitational pull above different locations on the planet's surface, giving the astronomers information about what lay below.
What they found was not a homogenous and well-mixed composition, but instead a higher concentration of"metals" - elements heavier than hydrogen and helium - towards the centre of the planet. The team of astronomers says the most likely explanation is that Jupiter absorbed numbers of"planetesimals", getting bigger and bigger.
Planetesimals are one of a class of bodies that are believed to have coalesced to form Earth and the other planets after condensing from concentrations of diffuse matter early in the history of the solar system.
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