First Sentence:
In past times the apparition of a great comet "invading" the hitherto serene heavens struck fear into the hearts of many people.
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Key Phrases - Statistically Improbable Phrases (SIPs):
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comet imaging, synchronic bands, celestial phantoms, false nucleus, comet photography, observing comets, comet images, comet observing, fainter comets, comet observer, inner coma, faint comets, bias frame, brightest comets, focal ratio, particular comet, exit pupil, dust tail, most comets, other comets, comparison star, ion tail, orbital elements, bright comets, setting circles
Key Phrases - Capitalized Phrases (CAPs):
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Solar System, Observing Comets Figure, Martin Mobberley, Nick James, Comets Unveiled, Herman Mikuz, Advanced Amateur Astronomy, Biela's Comet, Christian Buil, Gerald North, Terry Platt, The Orion, Comet Hale-Bopp, Robert Bullen, Starlight Xpress
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