Re:Ask HN: Is gravity a renewable energy source
by aspiretoreality on Saturday August 27, 2016 @08:12PM
(#12374738)
Hmm... for example, the scheme of solar or tidal energy to move water uphill, then grab hydroelectricity? is an example of storing gravity? is that a valid characterization?
And yes, you immediately got the worry; that accessing gravity would at scale over a few hundred years, be a danger.
Re:Ask HN: Is gravity a renewable energy source
by airbreather on Saturday August 27, 2016 @08:59PM
(#12374834)
In the uphill concept, consider gravity as the spring or rubber band that is stretched.
Harnessing gravity could occur in the form of the "slingshot" orbits, where a spacecraft steals a small amount of the stored orbital energy of the moon or planet from it's parent plant or sun, but due to the relative masses and speeds the impact is real, but practically negligible - steal too much energy from the orbiting body and and there will be a noticeable impact to the orbit.