[knarf]

Why are so many planets/planetoids/satllites/moons always round but the rogue asteroids are ugly masses ?

[plsvn]

Why are so many planets/planetoids/satllites/moons always round but the rogue asteroids are ugly masses ?

It's really because asteroids are way too small for gravity to do its thing to pull them into a more spherical shape.

[Drew68]

Why are so many planets/planetoids/satllites/moons always round but the rogue asteroids are ugly masses ?

Mass and gravity.

Given enough mass, gravity will pull everything into a sphere. Smaller objects don't have the mass required for this to happen.

[verum ago]

Why are so many planets/planetoids/satllites/moons always round but the rogue asteroids are ugly masses ?

Because in order to be spheroidal, something must have sufficient mass to deform into that shape via gravity. And gravity tends to concentrate independent masses together into systems. So the nice round planets, moons, etc have long since been consolidated into systems and/or swept their orbits clear. The remaining scattered stuff small enough to gravitationally slung around on weird trajectories just generally isn't big enough for gravity to squash into a spheroidal shape. And those that originally were have already merged with or gone into orbit around something bigger.

[cpdiii]

Why are so many planets/planetoids/satllites/moons always round but the rogue asteroids are ugly masses ?

Gravity makes things round. If there is not enough mass this does not happen.

[knarf]

THIS is the second time I've corrected my tagline . . . . SOME thing or one has me singled out.

I'be used this tagline for years.