why are planets round rather than square?

[Lewis A]

and i doubt about the gravity thing because what about planets with next to no gravity wouldnt the be less like a sphere?

 

[Tom S]

Gravity would pull the points of the cube (squares have only two dimensions) down, this would make a sphere. To meet the definition of a planet, they have to be massive enough to become spherical. Small asteroids and moons (like Mars's) are not massive enough to do that. Therefore they are not planets.

 

[homer]

gravity,the only ones with next to no gravity aren't round