Are the orbits of the planets synchronized on the same plane?
Why are most planet orbits in our solar system on relatively the same 2D plane?
Which star has the most planets orbiting it? Why do all planetary systems orbit stars? Does a planetary orbit depend on the sun? What is the point of all the other planets? How many planets are currently in our solar system? What effect do the other planets in the solar system have on Earth? Why is the earth's orbit around the sun almost circular? How many planets do we have in our solar system? How is each planet different from each other? Do all planets have to orbit a star? Does the gravity of the planets affect the orbit of other planets in our solar system? What's the point of existence of other planets? Why doesn't Jupiter orbit the sun? How close can two or more Earth sized planets orbiting a small star come before they adversely affect each others’ orbits? How do flat earthers explain the rotation of planets as seen through telescopes? How many planets are there in the solar system? Why are stars and planets spherical instead of having other shapes? Does rotation of planet depends on its radius? Which nation has launched the most satellites into orbit around Earth? Which planet in our solar system is the most habitable besides earth? Is the planet earth moving close to the sun with every orbit? Which planet is considered as the earth's twin? Why the path of planets is elliptical not circular? How many moons, planets and dwarf planets do we have in our solar system? How many planets are there in the solar system including the dwarf planet? Given the trillions of objects orbiting the sun in the Asteroid, Kuiper-Edgeworth and Oort Belts, why haven't more coalesced to form planets? How many spherical moons, dwarf planets and terrestrial planets are there in the Solar System? How big would the sun look on other planets? Why are all the planets and moons round? Why the jovian planets have rings around them? Why don't planets have phases like the moon?