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Preface to the third edition About this book and how to use it Part I. Time: 1. Calendars 2. The date of Easter 3. Converting the date to the day number 4. Julian day numbers 5. Converting the Julian day number to the calendar date 6. Finding the day of the week 7. Converting hours, minutes and seconds to decimal hours 8. Converting decimal hours to hours, minutes and seconds 9. Converting the local time to UT 10. Converting UT to local civil time 11. Sidereal time (ST) 12. Conversion of UT to GST 13. Conversion of GST to UT 14. Local sidereal time (LST) 15. Converting LST to GST 16. Ephemeris time (ET) and terrestrial dynamic time Part II. Coordinate Systems: 17. Horizon coordinates 18. Equatorial coordinates 19. Ecliptic coordinates 20. Galactic coordinates 21. Converting between decimal degrees and degrees, minutes and seconds 22. Converting between angles expressed in degrees and angles expressed in hours 23. Converting between one coordinate system and another 24. Converting between right ascension and hour-angles 25. Equatorial to horizon coordinate conversion 26. Horizon to equatorial coordinate conversion 27. Ecliptic to equatorial coordinate conversion 28. Equatorial to ecliptic coordinate conversion 29. Equatorial to galactic coordinate conversion 30. Galactic to equatorial coordinate conversion 31. Generalised coordinate transformations 32. The angle between two celestial objects 33. Rising and setting 34. Precession 35. Nutation 36. Aberration 37. Refraction 38. Geocentric parallax and the figure of the Earth 39. Calculating corrections for parallax 40. Heliographic coordinates 41. Carrington rotation numbers 42. Selenographic coordinates 43. Atmospheric extinction Part III. The Sun: 44. Orbits 45. The apparent orbit of the Sun 46. Calculating the position of the Sun 47. Calculating orbits more precisely 48. Calculating the Sun's distance and angular size 49. Sunrise and sunset 50. Twilight 51. The equation of time 52. Solar elongations Part IV. The Planets, Comets and Binary Stars: 53. The planetary orbits 54. Calculating the coordinates of a planet 55. Finding the approximate positions of the planets 56. Perturbations in a planet's orbit 57. The distance, light-travel time and angular size of a planet 58. The phases of the planets 59. The position-angle of the bright limb 60. The apparent brightness of a planet 61. Comets 62. Parabolic orbits 63. Binary-star orbits Part V. The Moon and Eclipses: 64. The Moon's orbit 65. Calculating the Moon's position 66. The Moon's hourly motions 67. The phases of the moon 68. The position-angle of the Moon's bright limb 69. The Moon's distance, angular size and horizontal parallax 70. Eclipses 72. The 'rules' of eclipses 73. Calculating a lunar eclipse 74. Calculating a solar eclipse 75. The Astronomical calendar Glossary of terms Symbols and abbreviations Index.

Library of Congress subject headings for this publication: Astronomy Problems, exercises, etc, Calculators