From: niklas.holsti@tidorum.invalid   
      
   On 2020-10-26 10:56, JF Mezei wrote:   
   > On 2020-10-25 09:39, Alain Fournier wrote:   
   >   
   >> The energy from tidal power generation comes from the potential energy   
   >> stored in Earth's rotation.   
   >   
   >   
   > Without a moon, the Earth's rotation woudld not cause tides.   
      
      
   The Sun's gravity also causes tides, which can add to or subtract from   
   the lunar tides. This is one reason why the height of the daily tidal   
   up-and-down varies from day to day (neap tides and spring tides).   
      
   In theory, other planets (Jupiter, say) also cause tides on Earth, but I   
   think they are too small to be measured.   
      
      
   > But the fact remains that the moon's gravity pulls water up.   
      
      
   So what? No-one is denying that. The question was when one can produce   
   power by means of gravity.   
      
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    * Origin: you cannot sedate... all the things you hate (1:229/2)