This latest news release from ESA, the European Space Agency, gives us the most accurate picture yet of the geoid, which
is the surface of an ideal global ocean in the absence of tides and currents, shaped only by gravity. It is a crucial reference for measuring ocean circulation, sea-level change and ice dynamics – all affected by climate change.
It has been measured by The Gravity Field and Steady-State Ocean Circulation Explorer (GOCE), an ESA satellite launched in 2009.
So to read more, and to watch Potato Earth rotating in space, click the picture to left, or the link at top.