Even the atoms that make up heavenly bodies are constantly moving. CONSERVATION OF ENERGY is why. read more
All the heveanly bodies revolve under the influence of gravity. You can visualise this by thinking of a man with a thread with a stone tied to its end. When the man spins the stone, the thread is the one which bounds the stone from running free, similarly the Sun acts as the man and the Earth as the stone. read more
Planets (mercury, venus, earth, mars, jupiter, saturn, uranus, neptune) Dwarf planets (eg pluto) Asteroids Keuiper belt objects Comets They do not affect earth directly, although occasionally an asteroid or comet impacts the planet. read more