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Which planets are the youngest and oldest in our solar system?

There are a couple of ways that scientists can date planets, so which planets formed first in our solar system?
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James Webb Space Telescope: Dazzling 4K View Of The N79 Nebula

The James Webb Space Telescope has captured a stunning view of the N79 nebula, located in the Large Magellanic Cloud. Credit: Space.com | imagery courtesy: ESA/Webb, NASA & CSA, O. Nayak, M. Meixner, ...