The Emily Dickinson poem (1510) at the beginning of the chapter is from The Complete Poems of Emily Dickinson, edited by Thomas H. Johnson, Little Brown and Company, Boston, 1960. Reprinted and modified with permission of Harvard University.
Quotes about time on page 4-2: St. Augustine, source of first quote unknown. Second quote from Confessions, quoted in A Dictionary of Scientific Quotations, edited by Alan L. MacKay, Institute of Physics Publishing, Bristol and Philadelphia, 1991, page 17. Giordano Bruno, The Candle Bearer, 1582, translated by J. B. Halle. Charles Lamb, Letter to Thomas Manning, 2 January 1806, quoted in A Dictionary of Scientific Quotations, page 145. S0ren Kierkegaard, Journals and Papers, 1843, translated by Howard V. Hong and Edna H. Hong. H. D. Thoreau, Walden (1854). Isaac Newton, Scholium to Definition 8 at the beginning of Principia Mathematica. Charles W. Misner, Kip S. Thorne, and John Archibald Wheeler, Gravitation, W. H. Freeman and Company, San Francisco (now New York), 1973. George Burns, quoted in New York Times, 23 August 1993, page A14. John Archibald Wheeler, American Journal of Physics, Volume 46, page 323 (1978). Barbara Stanwyck, from A Dictionary of Scientific Quotations, page 229.
Quote, page 4-9 by Wolfgang Rindler, American Journal of Physics, Volume 60, Number 10, page 893 (October 1994).
Final quote from Sir Isaac Newton's Mathematical Principles of Natural Philosophy and His System of the World, translated by Andrew Motte, Edited by Florian Cajori, University of California Press, 1946, pages 546-7.
Lester Clendenning helped to simplify the analysis of circular orbits in the exercises of this chapter.
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