I typed much of this several months ago also some of the material on colonization which has been moved to colonization of Mercury Keep on editing my posts as I still have a lot to learn Im unable to edit  to  of this talk page so a paste follows  But also corrected the straight forward surface gravity from  ms to  ms Fits with the comparedtoEarth number of  at least But meanwhile using the numbers in there for the mass and diameter I get a surface gravity of  ms Looking back through the history its been  ms since the page first got a surface gravity What gives    meters per second per second  ms is likely low but  is likely a bit high  ms is way low as is  for Earth g might be correct for Earths gravity in low Earth orbit but it is likely a bit less or it might be Earths surface g at Earths equator but likely that is a bit more  Neil