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2013년 12월 14일 토요일

How do we know Earth turns the sun?

 How do we know Earth turns the sun? We can't feel Earth turns the sun. Because human being can't feel Earth turns the sun, in 16th Century, most people believed Earth is center of cosmos. And let's know how do we know Earth turns the sun.
But, normal people can't feel Earth turns the sun. If you want to feel Earth turns the sun, you should observe sun and planets. And use data to prove Earth turns the sun.

1.Copernicus' observed data
 Why does Copernicus claim Earth turns the sun? He compared with his observed data to geocentrism. But it 
occured 8 ° error. So he compared to heliocentricism. It was 

accurate. But his data is professional,so we can't know about

it. 

2.Venus and Mercury

There is the sun, and there is the Earth. We saw, observed 

data of Venus,we can saw Venus is not more than 40 ° off to 

the Sun. So we can think Venus is located between the Sun 

and the Earth. Mercury is similar. But its angle is smaller than 

Venus. So we can think Mercury is located between the Sun 

and the Venus. And we can see Venus changes the shape 

like moon. If Venus turns the Earth, this phenomenon never 

occurs. So we can think Mercury and Venus turns the Sun.





3.Mars

Somedays, Mars is close and, somedays, Mars is far. SoMars 
turns the sun. Jupiter, Saturn, Uranus, Neptune is similar. So 
Jupiter, Saturn, Uranus, Neptune turn the sun, too. And let's prove Earth .

Sun's gravity makes planets turn the sun. So Earth turns the sun, too.




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