The Mystery of Comets |
Contents
The Fear of Comets | 1 |
Early Theories of Comets | 10 |
Breaking the Crystalline Spheres | 17 |
Copyright | |
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activity actually amorphous ice appear asteroids astronomers atmosphere atoms bodies bright comet calculated carbon century Chinese clues coma comet Encke comet Halley comet hunters comet IRAS-Araki-Alcock comet Kohoutek comet tails comet West cometary complex ice Courtesy dirty snowball discovered discovery distance dust Earth Earth's orbit electrons ellipse Encke Encke's comet extinctions formed gases Giotto grains gravity Halley Halley's comet heat huge hydrogen impact craters interstellar clouds IRAS Jupiter Jupiter's kilometers in diameter kilometers per second laboratory layer mass measured missions molecules Moon motion move Newton nucleus Observatory observed Öpik-Oort cloud orbital period outer P/Encke P/Halley particles perihelion photographic planetary planets possible prediction radiation regions rotating sandbank satellite seen Sekanina short-period Solar System solar wind space spacecraft spectrum sphere spin split comets stars stellar Sun's sungrazing sungrazing comet sunlight surface telescope temperature theory tion Tycho VEGA Venus warmed water-ice wavelength wild comets