<p>Why do we consider Earth to be at the centre for Celestial Sphere ? If so, then how will Sun revolve around Earth ? Doesn't it mean its like the geocentric model ?</p>

CC BY-SA 4.0
2021-07-16T09:03:18.660Z
Related: https://astronomy.stackexchange.com/questions/32782/tycho-brahes-model/35055#35055
John
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2021-07-16T09:07:04.297Z
A lot of astronomy is still conducted from Earth-based telescopes. A geocentric model is useful for such astronomy.
David Hammen
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2021-07-17T04:10:09.417Z
Observations are done from Earth. So, the centre of geocentric model should be Earth for better convenience.
Nilay Ghosh
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2021-07-17T10:05:07.183Z
Thanks a lot Guys!!
Suhas Adiga
CC BY-SA 4.0
2021-07-17T10:06:52.133Z
Thanks a lot John. Your answer has made me open my eyes and correct my assumption that Copernican model is valid. Thanks a lot friend
Suhas Adiga
<positional-astronomy><celestial-mechanics>
Why is Earth at centre of Celestial Sphere?
Suhas Adiga
# Why is Earth at centre of Celestial Sphere?

(Asked by: username_0 on 2021-07-16)

Why do we consider Earth to be at the centre for Celestial Sphere ? If so, then how will Sun revolve around Earth ? Doesn't it mean its like the geocentric model ?

**Tags:** positional-astronomy, celestial-mechanics

> **Comments:**
> **username_1**: Related: https://astronomy.stackexchange.com/questions/32782/tycho-brahes-model/35055#35055  
> **username_2**: A lot of astronomy is still conducted from Earth-based telescopes. A geocentric model is useful for such astronomy.  
> **username_3**: Observations are done from Earth. So, the centre of geocentric model should be Earth for better convenience.  
> **username_0**: Thanks a lot Guys!!  
> **username_0**: Thanks a lot username_1. Your answer has made me open my eyes and correct my assumption that Copernican model is valid. Thanks a lot friend  

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