If you just spoon more mass onto Jupiter, it doesn't get any bigger. In fact, if anything actually gets slightly smaller, it gets slightly slightly smaller. The biggest planet that was cold and there was no heat involved, pretty much the biggest planet you can get is Jupiter-sized. If we really want to get these planets big, you have to add heat. So take one of these Jupiter's and you park it next to a really hot star for it to puffs up. And then you get it to something 170 times larger. Probably not I think we don't have any ones that are twice as big but they could get pretty close to that.
What is the weirdest planet ever discovered? Neil deGrasse Tyson and comedian Chuck Nice discover bizarre exoplanets like Erebus, the impacts of living on a habitable moon, hot Jupiters, and more with astronomy professor David Kipping.
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Photo Credit: David A. Aguilar (CfA), CC BY-SA 3.0, via Wikimedia Commons
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