[MadMax, the Grinning Reaper]

Re “Why are all the planets everywhere round” and not “oblong, square, etc”.

Because their designer, GOD, is not a Democrat!!

[PIF]

All those are round bodies EXCEPT Saturn’s Moon Iapetus which is many sided ...

See: http://saturn.jpl.nasa.gov/multimedia/images/image-details.cfm?imageID=1270 - Saturn’s Moon Iapetus.