Gravity and Calculus.
If you're more interested in a scale model of the solar system, a device called an "Orrery" will do it for you. An Orrery is a clockwork model of a solar system.
Use Kepler's Laws of Planetary Motion.
Aristrotle
Mercury and Venus are the two planets that retrograde motion around the sun.
Scientists predict that they are planets because there wouldn't be random gas' from unknown places
Kepler's three laws are important because they are used to predict the positions of planets years into the future. That is a help to navigators, astronomers and people planning space voyages.
Because the planets are closer to us so when we look at the planets we can see them move so the closer an object is to you the easier it is to follow its motion. Hope you could use my answer
Engineers and Scientists use Newton's laws and their resulting equations, in order to help predict the motion of objects on the macroscopic level. They use them to predict where an object will be at a given time under certain initial conditions.
They use a Periodic Table.
Aristrotle
retrogade motion
Mercury and Venus are the two planets that retrograde motion around the sun.
Scientists predict that they are planets because there wouldn't be random gas' from unknown places
mercurys motion can be like any other planets motion
Kepler's three laws are important because they are used to predict the positions of planets years into the future. That is a help to navigators, astronomers and people planning space voyages.
Apparent motion of the planets.
In planetary terms, when referring to the motion of planets and moons etc. the motion is describes as orbiting. Moons are on orbit around planets, while the planets are in orbit around the sun. An orbital motion.
They both spin on an axis.
You can predict its motion until some force acts on it.