08:14 <queqiao-> ⟨Proton | Mod.ROTanks Protester⟩ Looks a little sus to me.

09:39 <queqiao-> ⟨egg⟩ (These are equipotentials in the rotating-pulsating reference frame fixing Jupiter and Europa, in the vicinity of the latter; L1 and L2 are visible.)

09:39 <queqiao-> ⟨egg⟩ (and since the bridge was down when I posted the image: https://cdn.discordapp.com/attachments/480397772248580098/1071322561226477638/europa.png)

09:48 <queqiao-> ⟨iso⟩ ⟪egg⟫ (These are equipotentials in the […] ⮪ Would these be time dependent? since rotating pulsating (assuming eccentric orbits) is non autonomous?

09:54 <queqiao-> ⟨egg⟩ In the rotatnig-pulsating frame of two bodies in Keplerian motion, the time-dependence of the fictitious forces cancels out the time-dependence of the gravitational force, so the potential is fixed (up to a time-dependent but space-independent factor, which doesn’t matter when it comes to drawing the thing)

09:57 <queqiao-> ⟨egg⟩ (of course a third body won’t be fixed in that frame and will mess with the potential a little ; you can see the effect of the Sun on the Earth–Moon potential in https://user-images.githubusercontent.com/2284290/213957618-c1019869-24b4-458c-bac4-b4920214bd3b.gif posted earlier)

09:58 <queqiao-> ⟨egg⟩ ⟪iso⟫ Would these be time dependent? since […] ⮪ See https://github.com/mockingbirdnest/Principia/blob/master/documentation/Rotating%20Pulsating.pdf

10:03 <queqiao-> ⟨iso⟩ Ah, that’s neat! Thanks for the additional information, it’s very helpful.

13:17 <queqiao-> ⟨egg⟩ o O ( is Butcher related to https://en.wikipedia.org/wiki/John_C._Butcher )

13:37 <queqiao-> ⟨Butcher⟩ Don't think so, my real name is unrelated to my discord handle sadly. 😆

13:53 <queqiao-> ⟨egg⟩ https://matrix.mockingbirdnest.com/_matrix/media/r0/download/matrix.mockingbirdnest.com/gLXdBZgsAJmzThVyuKoginPl/20230204_114349.jpg

13:53 <queqiao-> ⟨egg⟩ Kuala Lumpur cat

20:35 <queqiao-> ⟨lpg⟩ Anyone know if it's expected that FATAL errors _don't_ crash to desktop on macOS, they just freeze the game?