Word: cometted
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...Freaks. Cometphobia took another form during Halley's reappearance in 1910. Fearing that mankind would be poisoned as the earth passed through noxious gases in the comet's tail, many people bought gas masks and "comet pills" to prevent asphyxiation; they also staged a round of end-of-the-world parties. But the gases were far too tenuous to do any damage, and the earth remained unscathed. One famous prediction, however, did come to pass. Mark Twain, who had been born during the comet's previous visitation in 1835, and wrote that he expected to die during...
Perhaps the most famous comet tale was written by Futurist H.G. Wells. In his 1906 novel In the Days of the Comet, the earth was enveloped in a mysterious green gas from a comet's tail just as war broke out between England and France. The vapors had so beneficent an effect that the combatants fell asleep for three hours, awoke to a world without war and began building a Utopia of socialism and love. In contrast, there is the bleak view of Psychologist turned Amateur Geophysicist Immanuel Velikovsky. In his bestselling 1950 book Worlds in Collision-which...
...gravity of a massive planet, probably Saturn or Jupiter, they often enter a highly elliptical orbit that swings them close to the sun and then so far out again that they do not return to the vicinity of the sun for years. Some, like Encke's comet, which makes a pass around the sun every 3.3 years, have relatively small orbits. Others loop out billions of miles from the sun, and millions of years elapse before they return...
...comet enters the inner part of the solar system, the sun's heat begins to liberate dust and gases from the nucleus, forming a large cloud called the coma. Such clouds may become Jovian in proportions, with a diameter of more than 100,000 miles, though they are very thinly dispersed. In 1969 and 1970, NASA'S Orbiting Astronomical Observatory (OAO-2) discovered that the coma of comets is surrounded by a still larger ball of wispy hydrogen that may far exceed the sun's diameter of 860,000 miles...
...hydrogen cloud is believed to be formed from the dissociation of water molecules in the nucleus. As the comet nears the sun, it acquires its most characteristic feature. Bombarded steadily by the charged particles of the solar wind and by the slight but measurable pressure of sunlight itself, the cometary gases and dust are swept back to form one or more glowing tails. These may reach lengths of 60 million miles or more, roughly two-thirds the distance between earth and sun. Regardless of the direction of the comet's travels, its tail is always directed away from...