Joel Kontinen
A new article in New Scientist says that it has been a mystery why planets spin the same way as their stars do, This, it says, is contrary to the standard evolutionary model.
However, if posits: The standard model of planetary growth states that planets coalesce from giant rocks that are kilometres across.
Here’s their answer:
“Models of that process result in planets that barely spin at all because similar amounts of boulders hit the fledgling planet from all sides. “
Now, how could you get similar amounts of boulders hitting all planets from all sides? that is still a problem for the standard model.
Planet-formation theories have been challenged or killed by recent finds.
Source:
Crane, Leah. 2019. Tiny pebbles may be the reason most planets spin in the same direction. New Scientist.
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