Gravity varies around the world Here s where it changes the most washingtonpost.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from washingtonpost.com Daily Mail and Mail on Sunday newspapers.
Rather than being a perfect sphere, Earth, along with every other planet we know of, is described as an "ellipsoid," while "geoid" refers to the planet's surface.