Why are all planets spheres?
If there is no gravity in space, why are planets spherical?
How is the gravity of other planets measured? If the center of a uniformity dense sphere experiences zero gravity, how come the centers of stars and planets are such high pressure enviornments? Is there gravity in space? Is there a point of no gravity inside an empty semi-sphere? Is there no gravity inside the Earth? Is there no gravity inside the earth? How do they measure gravity in other planets and stars? What if there is no gravity on earth? Why does a human heart turn spherical in space? Why do extraterrestrial bodies always appear as a spherical shape? Why not square or cylindrical? Is there gravity without mass? Why is Space called Outer Space? Which planet has the lowest gravity? Why do objects have gravity? If the Earth was a cube, how and why would the gravity be different? What's the point of existence of other planets? If the earth was a cube, how would gravity be different? Why is the orbital period of a satellite independent of its mass? If all the mass in the universe was condensed into two separate and equal spheres, would they remain in perpetual orbit around their center of mass? If the moon has no gravity in position, how could you define the weight or mass of an object in planet moon? Why don't planets have phases like the moon? Shouldn’t the shape of the universe be a 3D sphere? How is zero gravity created on earth? Why is gravity zero at the center of the earth? Is there an equation which can calculate the gravity of the planets and their moons in our solar system simultaneously? How do flat earthers explain the rotation of planets as seen through telescopes? What are natural satellites of a planet? Why are most planet orbits in our solar system on relatively the same 2D plane? Is there a planet bigger than Jupiter? What actually is Gravity?