how do we prof that the earth is circle around the sun ,and not the sun around the earth?

Answer 1

http://en.allexperts.com/q/Astronomy-1360/earth-revolves-around-sun.htm

Answer 2

We don't prove it, we infer it from observations. Observations such as:

1: Venus shows a cycle of phases and size that can only work if it goes around the Sun.

2: Jupiter is observed to have its own set of Moons orbiting it.

Observations 1 and 2 make it clear that not everything is centred on Earth.

3: The Earth is much smaller than the Sun, so in a gravitational model it makes more sense to have the Sun holding the Earth with its greater gravity than the Earth holding the Sun.

4: Planets show retrograde motion, which is explained much more simply by having us move in an orbit and pass them in theirs than by generating weird mathematical functions to explain their motion.

5: Stellar parallax is consistent with the Earth moving in a circle roughly 300 million km in diameter.

So, can you describe the motions of the solar system with Earth as the fixed central point? Oh yes, absolutely. Is it easier if you put the Earth in orbit round the Sun and work it all out that way? Much.

Answer 3

We don't prove it either way. You could write the equations of motion with the Sun going around the Earth if you want. But the equations would be about 100 times more complicated than the equations with the Earth going around the Sun (for the same level of accuracy).

That's all that Galileo really showed -- that the equations were easier with the Sun at the center of the solar system. Now we use the "barycenter" as the origin of the equations. That's the point at the center of gravity for the Sun plus all the planets, but it's pretty close to the center of the Sun.

Answer 4

Yes we do

However there IS theoretical proofs that the Earth does not move, which is a paradox (Michelson Morely Nobel winning experiement)

But that's only THEORTICAL

We KNOW for a fact we travel around the sun.

Now, you can see that a THEORY can be BOGUS

The Michelson Morley experiement establishes a THEORY we are motionless in space

But observations from outer space PROVE absolutely this is a false theory.

Which is why creationists have problems with theories like MAN COMES FROM APES

Theories can be BOGUS when you look at things in a REALITY perspective.

But this is not always true

But the Michelson Morely experiment does prove that a theory is so blind it can't see beyond the nose

If they every prove a Tachyon exists, it will challenge Einstein's theories.

Answer 5

1.) We do some basic mathematics based on their relative gravitational pulls.

2.) We shoot a satellite into orbit and take pictures of it.

3.) We observe the curious "looping" path that the other planets take in the night sky over successive nights.

4.) We observe the differences in stars' positions (the "parallax") after half a year has passed.

Answer 6

first, its an elipse (an oval shape orbit)

and because the earth has nowhere near enough gravity to hold the sun in an orbit.

and we can also see by the ways planets move that we go around the sun

Answer 7

We can also observe stellar abberation, aka annual abberation or the abberation of light. This causes the position of stars to move in very tiny ellipses over the course of a year. It was the first direct proof that the Earth's moving.

Answer 8

Sun has more graviational force than earth does...so how do u expect earth to make sun go around us in an orbit???

Answer 9

By taking relative motion of other stars and planet.

Answer 10

http://sg.answers.yahoo.com/question/index?qid=20070427142320AAcUcB0