Giant impacts could explain the many differences between the ice giants of our solar system, computer simulations show.
seem like they should look the same. They have similar masses, sizes and distances from the sun, and scientists long thought they formed in a similar way. But we need only look at them to see that the two planets are obviously different. It's an indication they might not be as similar as they seem at first blush.
Now, a team of researchers has used computer simulations to show that collisions with large, rocky bodies could have led to the two planets’ diverging histories, possibly explaining why they look so different.Perhaps the most obvious difference between the ice giants is their rotation angles. The spin of the planet Uranus is tilted by about 98 degrees compared to its orbital plane.
Past studies have suggested that giant impacts might explain the tilted spin of Uranus, while also accounting for other differences between the ice giants. So Christian Reinhardt of the University of Zurich and other researchers decided to test whether today’s state-of-the-art 3D simulations would support these ideas.
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