Pear-shaped Earth

Robert H. McNaught (
Mon, 9 Mar 1998 16:07:22 +1100 (EST)

I'm not sure if anyone ever really believed that the Earth is pear shaped
(hardly an advance over the flat earth if much of it is concave!), but that
is a common statement.  As Ted says, it is an description of how the geoid
varies from an oblate spheroid, but in common parlance, these are not easy
things to describe.