'Tunguska event' diaporamas de présentation

The Solar System

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Stones from the sky?

Stones from the sky?. In the Aristotelian model of the Universe, planetary orbits are separated by crystalline spheres. It is consequently impossible for stones to fall from heaven (a view also held by Newton).

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Chapter 12 The Origin of the Solar System Asteroids Comets Meteors and meteoroids

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NEO WISE

NEO WISE. http://neowise.ipac.caltech.edu/. New observations by NASA's Wide-field Infrared Survey Explorer (WISE), shows near-Earth asteroids in the mid-size range. NASA has found 90 percent + of the largest near-Earth asteroids (A 1998 Congressional goal).

300 views • 15 slides