Comment on The Orbit of Planet NineComments−kibwen5y> We find a P9 mass of 6.2 (+2.2, −1.3) Earth massesThis wouldn't even be half the mass of the smallest gaseous planet, but would be much larger than the largest terrestrial planet. Which do astronomers think it would be?−azernik5yEither way, it would be very useful for inferring the properties of extrasolar planets in that size range.−ncmncm5ySince it would be frozen, it would be hard to call it a gaseous planet. Even water, nitrogen, and oxygen are rocks, out there.−koheripbal5yIt would be rocky.−SideburnsOfDoom5yIt would be of a temperature where most things are rocks.If it's not Hydrogen, it's rocks.
Comments
> We find a P9 mass of 6.2 (+2.2, −1.3) Earth masses
This wouldn't even be half the mass of the smallest gaseous planet, but would be much larger than the largest terrestrial planet. Which do astronomers think it would be?
Either way, it would be very useful for inferring the properties of extrasolar planets in that size range.
Since it would be frozen, it would be hard to call it a gaseous planet. Even water, nitrogen, and oxygen are rocks, out there.
It would be rocky.
It would be of a temperature where most things are rocks.
If it's not Hydrogen, it's rocks.