Abstract
Like everyone else, comet hunters are a disparate group of people with diverse jobs and life-styles, but they never veer far from the direction of their dreams, a lonely patch of haze secretly lurking in the sky. The beat to which comet hunters keep pace is set by the moon, whose eastward march defines the dark hours for hunting. Because they hunt for a variety of reasons, some scientists have scorned their work; in 1930 for example, Harvard College Observatory Director Harlow Shapley praised and insulted Messier in a single sentence: “He is remembered for his catalogue; forgotten as the applause-seeking discoverer of comets.”2 And then only 4 years later, Shapley lauded comet hunter Leslie Peltier as “the world’s greatest nonprofessional astronomer.”3
If one advances confidently in the direction of his dreams, and endeavors to live the life he has imagined, then he will meet with a success unexpected in common hours.
If a man does not keep pace with his companions, perhaps it is because he hears a different drummer. Let him step to the music which he hears, however measured and far away.
Henry David Thoreau1
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References
Chapter 6
H. D. Thoreau, Waiden, 1854
W. Harding, ed. The Variorum Waiden (New York: Twayne, 1962), 259, 261.
Jones, 371.
Ibid., Peltier, 237.
Proctor and Crommelin, 112.
Ibid., 117–18.
Observatory 4, 331 (1881).
This story comes from G. Kronk, Comets: A Descriptive Catalog (Hillside, NJ: Enslow, 1984), 120.
Peltier, 36.
Ibid., 127.
Ibid., 134.
F. L. Whipple, The Mystery of Comets (Washington, DC: Smithsonian Institution Press, 1985), 145–147.
Whipple announced his theory in two papers. “A Comet Model. I. The Acceleration of Comet Encke,” Astrophysical Journal 111 (1950), 375–94, explains how the orbit of periodic Comet Encke, which is shrinking with each return, is interpreted if the structure of its nucleus consists of meteoric material embedded in ices that sublimate to gases. As the freed material rushes out of the comet with some force, it can accelerate the comet. The second paper, “Physical Relations for Comets and Meteors” Astrophysical Journal 113 (1951), 464–74, expands on this model.
R. Gore, “Much More Than Met the Eye: Halley’s Comet ’86,” National Geographic 170 (1986), 778.
1AU Circular 1924, Sept. 28, 1965.
Circular 1925, Oct. 1, 1965. See also B. G. Marsden, personal communication, Jan. 2, 1993.
B. G. Marsden, “The Sun-Grazing Comet Group,” Astronomical Journal 72 (1967) 1179.
Circular 1932, Oct. 26, 1965, and personal communication, August 1993.
P. L. Brown, Comets, Meteorites, and Men (London: Robert Hale and Co., 1973), 91.
Circulars 1937, Nov. 9, 1965, and 1949, Feb. 8, 1966. The suggested periods were 830 and 1110 years.
W. Houston, personal communication.
Peltier, 231.
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© 1994 David H. Levy
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Levy, D.H. (1994). A Different Drummer. In: The Quest for Comets. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-5998-0_6
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DOI: https://doi.org/10.1007/978-1-4899-5998-0_6
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