3 ms·
> ... decreased by increased mass. I don't think this is in general true for planets or stars. You're confounding multiple effects. For a fixed number of parti
by queuebert 1y ago
> ... decreased by increased mass.
I don't think this is in general true for planets or stars. You're confounding multiple effects. For a fixed number of particles, increasing metallicity, which follows average particle mass, should reduce radius, but for a fixed metallicity and temperature, increasing particles will increase radius. Temp has the effects stated. You can roughly validate this by the fact that massive planets and stars are bigger than less massive ones. Obviously many other things start happening as stars reach end of life...
- lazide 1y agoIn the sense that higher gravity increases density all other things being equal. yes, absolute size will slowly increase - until it collapses, anyway.
- lazide 1y agoGas giants generally only get slightly larger than Jupiter (even with adding a lot of mass), until they start to shrink - and eventually with enough mass, turn into actual stars [https://en.m.wikipedia.org/wiki/Gas_giant https://en.m.wikipedia.org/wiki/Gas_giant] So generally, gas giants don’t get much bigger than Jupiter.