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The Fear of Comets
The Paths of Comets
The Return of Halleys Comet
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American AMNH aphelion Apian approaches the Sun April ASIMOV asteroid asteroid belt astronomer B.C. No reports Bayeux Tapestry Biela's Comet bright comet calculated Camille Flammarion century Chinese records circled the Sun close collision coma comet appeared comet fear Comet Kohoutek comets circling comets moved Crater detected dim comet dinosaurs disaster distance distant comets Donati's Comet Dying Earth passes Edmund Halley ellipse Encke's Comet Europe European fragments German astronomer Giotto gravitational pulls Halley Halley's Comet helium hydrogen icy substances Johann Jupiter Kepler L'Astron Lexell's Comet ley's Comet light-years long ellipse meteor shower meteor swarm meteorite million miles motion nuclear object observed omens Oort parabolic particles path perihelion Peter Apian planetary planets predicted published a book return of Halley's rocket Saturn scientist seen short-period comet solar system solar wind space spectacular Star of Bethlehem Sun-grazer sure tail always pointed Tycho vapor visible Yerkes Observatory
Groundbreaking Scientific Experiments, Inventions, and Discoveries of the ...
No preview available - 2003
Planets, Sunspots and Earthquakes: Effects on the Sun, the Earth and Its ...
No preview available - 2002