Reply to post: Re: Potato Rule doesn't apply

Holy planetesimal formation, Batman! Ultima Thule's no snowman – it's a friggin' pancake

STOP_FORTH

Re: Potato Rule doesn't apply

I think Version1.0's point is that when things get big enough gravity tends to make them spherical no matter what shape they were originally. There is a minimum size/mass for this to happen.

For rocky/metallic bodies this size is somewhere between Vesta and Ceres.

For icy bodies this happens at a smaller mass (presumably bigger than Ultima Thule.)

For something made out of nickel and iron this size will be bigger than Ceres.

But if they spin fast enough (like Saturn) they start to bulge out at the equator and stop being spherical.

POST COMMENT House rules

Not a member of The Register? Create a new account here.

  • Enter your comment

  • Add an icon

Anonymous cowards cannot choose their icon

Biting the hand that feeds IT © 1998–2019