When Jupiter was young, a massive planet likely slammed into it

Al M.

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Sep 10, 2013
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Greater Boston
https://www.cnn.com/2019/08/15/world/jupiter-planet-impact-scn-trnd/index.html

Last paragraph:
"That makes the case for the giant impact much stronger," Helled said. "It seems that such violent impacts were very common in the young solar system and interestingly, they played an important role in shaping the planetary characteristics -- not only for Jupiter, as we suggest in this paper, but also for other planets, to explain the Earth's moon, the high metal-to-rock fraction in Mercury, and Uranus' tilt."
 

Hipper

Well-Known Member
Jun 12, 2011
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Hertfordshire, UK
If you can get a chance to see the BBC production 'The Planets', episode three is about Jupiter. It talks of the young planet moving out of its orbit towards the sun, hoovering up lots of early debris and so preventing the full development of Mars (ten times smaller then Earth or Venus).

The Planets - Jupiter
 

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