Why are planetary orbits ellipses?
Why are the orbits of planets elliptical?
Does the radius of elliptical orbit of planets, or satellites decrease with time? Why is the orbital period of a satellite independent of its mass? Why don't planets have phases like the moon? Do all planets have to orbit a star? Does a planetary orbit depend on the sun? What is an orbital? What is an Orbital? Why does Uranus not orbit anticlockwise like the rest of the planets? Why are the shapes of planets and stars spherical? Why aren't they square or any other shape? 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? What is the geostationary earth orbit? Does the Milky Way orbit around anything? If so, what's its orbital period? What is meant by orbital? What is the Molecular Orbital theory? Is a shell the same as an orbit? Why do some planets have rings? What determines their size and shape? What is the point of all the other planets? Why cant we send space probes with orbits similar to that of comets? Why was molecular orbital theory developed? Why is it important? What is meant by a geostationary orbit? Can two planets share the same orbit? What equation of motion does the Earth follow while orbiting the sun? Why so? What is the molecular orbital? How is the gravity of other planets measured? What's the point of existence of other planets? Is there an equation which can calculate the gravity of the planets and their moons in our solar system simultaneously? How can you explain Uranus's tilted orbit using Einstein's view of gravity? How do satellites stay in orbits and avoid each other? Could a planet orbit two suns in a figure 8 pattern?