"THE STRUCTURE OF THE PHYSICAL WORLD IS MANIFESTED ON MANY DIFFERENT SCALES,
RANGING FROM THE UNIVERSE ON THE LARGEST SCALE, DOWN THROUGH GALAXIES, STARS
AND PLANETS, TO LIVING CREATURES, CELLS AND ATOMS....
... THE SIZE OF A PLANET IS THE GEOMETRIC MEAN OF THE SIZE OF THE UNIVERSE
AND THE SIZE OF AN ATOM;
THE MASS OF MAN IS THE GEOMETRIC MEAN OF THE MASS OF A PLANET AND THE MASS
OF A PROTON."
CARR, B.J., and M.J. REES: "The Anthropic Principle and
the Structure of the Physical World",
NATURE, vol. 278 (April 12, 1979), pp.605-612
(perhaps we could call this one a 'perhapsoid')