Why are all the planets and moons round?
Why are planets spherical?
Why do extraterrestrial bodies always appear as a spherical shape? Why not square or cylindrical? Why is the universe not a sphere? Why are most planet orbits in our solar system on relatively the same 2D plane? What's the point of existence of other planets? What are natural satellites of a planet? How many spherical moons, dwarf planets and terrestrial planets are there in the Solar System? Why do other planets have no life? Why is the orbital period of a satellite independent of its mass? What is a planet? Does rotation of planet depends on its radius? How is the gravity of other planets measured? How have the planets been named? Why does a human heart turn spherical in space? Do all planets have to orbit a star? Shouldn’t the shape of the universe be a 3D sphere? What is the shape of the universe, conical or spherical? What is the principle behind why celestial objects like planets do not collapse into the gravity of the sun but revolve around it? Do spheres actually have 8 sides? What are the dwarf planets in the solar system? Are there satellites orb? Is there a planet bigger than Jupiter? Are the orbits of each planets coplanar? What are the natural satellites of earth? Why doesn't Jupiter orbit the sun? Does the gravity of the planets affect the orbit of other planets in our solar system? Is it sad that other planets in our solar system look so lifeless? How did the planets get their names? Can a planet have an orbit shaped like a figure 8? Why does even NASA show the Solar System as on a plane? It's all 2D - aren't our celestial neighbors surrounding us in 3 dimensions? Why are snowflakes symmetrical?