Arboris - the Green Moon

Arboris is the green moon that orbits our world, and is the body responsible for the tides, according to observations made by Theodore Crumb.
  It is he, also that has brought forward evidence that the green moon is such, because it is in fact a forested planet, holding far less ocean and seas than our own. Crumb states that this is an undeniable fact given that one may see such detail through his own invention of what he calls the astroscope, a device somewhat similar to a spyglass, but used to see distant objects beyond our skies.
  Although only conjecture at this time, Crumb puts forth the proposal that the elven nations perhaps do not specifically originate from this moon, but given their seemingly mystical connection with it, and surmised that there may be elves living there even now.