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International Year of Astronomy - IYA2009
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Why aren't all celestial bodies spherical?
The heavens were divine in origin and, as a consequence, had to be perfect in structure and form; hence the astronomers of antiquity sought to discover perfect geometrical forms in the celestial bodies and their movements – spheres and circles. Today, we still look at the stars, planets and their moons as spherical bodies. But smaller celestial bodies such as asteroids and comets are often irregular in shape and tend to look more like potatoes. Why is that?
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Last update: 31/08/2009 11:19:30