>> ... So how exactly do two planetary bodies share energy
>> remotely ? What is the carrier for that ?
> 
> Exchange of gravitons.

Yes, TBD. Gravitons are theorised to be the gauge boson carriers
for gravitation. It would be great if the LHC could fill in some gaps

The usual practical demonstration of gravity - or rather timespace
curvature - is to put a heavy ball on a rubber sheet (like a trampoline)
and show how other balls 'orbit' and fall in, rather like they would
down a funnel. That's quite a people-friendly planar representation.
Exchange of gravitons would be a 3-dimensional version of that

I still have trouble getting my head around particles travelling at the
speed of light interacting when they are massless. It gets to the point
when you wonder exactly how deep you need to dig to reach the
real answers to questions like What is energy ? What is information ?
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