![]() ![]() This would be expected if they all formed from a disk of debris around the proto-Sun.Ģ. Most of their moons also orbit in that direction, and the planets (and the Sun) rotate in the same direction. All the planets orbit the Sun in the same direction. In fact it was these observations which lead to the proposal of the theory in the first place.ġ. Observations of the solar system itself support the theory too. Current simulations of the formation of a solar system from a cloud of gas work quite well. You can put into the simulation details of how the physics should happen and then run it to see what the result is. Many astronomers spend most of their time constructing detailed simulations of physical processes in computers. Other lines of evidence come from simulations of the process. We see stars forming in the depths of giant clouds of gas and dust, and we even see young stars with disks of debris around them, which look just like the debris disk we think the planets formed from. It would be strange if our Solar System formed in a different way to every other system in the Galaxy, since physics is supposed to work the same way everywhere. ![]() Perhaps the most convincing line of evidence supporting this theory are observations of the same process currently happening elsewhere in our Galaxy. What is the evidence to support this theory? The standard model for formation of the Solar System is that it formed from a giant interstellar cloud.
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