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Talk:Geocentric theory (view source)
Revision as of 17:01, November 22, 2016
, 17:01, November 22, 2016no edit summary
--[[User:BRichtigen|BRichtigen]] 07:54, 7 November 2008 (EST)
--[[User:BRichtigen|BRichtigen]] 07:54, 7 November 2008 (EST)
I'm generally happy with this except for the last paragraph. I find it difficult to follow so if someone could add a diagram, that would be excellent.
From what I understand, it suggests that at full moon, an observer on earth sees it travel at 2,288 mph and one on the sun would see it travel at 69,288 mph. This figure is calculated by adding the relative speeds of the earth and moon. This is ok.
The problem is that the when the moon moves round in its orbit, an observer on earth still sees it moving at 2,288 mph, not 69,288 mph. At the earth's surface, escape velocity is about 25,000 mph so if it really was going 69,288 mph, it would very quickly escape. Also if this was the case then energy is not conserved, the kinetic energy of the moon increases by at least 10 more the loss in potential.
I think this is a simple mistake when moving between different frames of reference. [[User:PeterIceHockey|PeterIceHockey]] ([[User talk:PeterIceHockey|talk]]) 12:01, 22 November 2016 (EST)