I found it super helpful to have the Sun's center of mass labeled!
I only wish Jupiter's center of mass was also labeled in this graphic. I've been trying to puzzle it out myself, but I'm stumped!
this post was submitted on 03 Sep 2025
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I think if it's to scale, Jupiter is way offscreen, like in another room in your building far away.
That’s why I lose my balance!
Jupiter is so massive, if you give it more hydrogen, it gets smaller.
My dumb friend wants to know why adding more mass would make Jupiter smaller, can you help explain it to him?
I misrembered, it remains roughly the same volume, until 1.6 juipiters of mass, at which point the effect of gravity from each additional hydrogen is greater than the intermolecular forces and additional hydrogen would cause it to compress more than it would grow.
Thanks for the explanation, clears it up completely.
The increased mass increases the force of gravity on the outer particles which ends up reducing the radius more than the increase due to the layer of new hydrogen, IIRC.
Thank you - my friend was only thinking in terms of smaller by mass not thinking about volume.
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Fun fact: if I threw a rock hard enough, it and the sun would orbit around their "barycenter" which would happen to be just about the center of the sun (probably, i dont work here).
how much wobble does the earth add to sun? over 1m?
No one objects orbits another. There are no stable orbits since there are no examples of two perfect point masses in an isolated space.
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