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31. A man-made clock would certainly prove a useful accessory to astronomical reckoning but could never stand in its stead.

32. Like the precise astronomical observations of the Maya, these technical achievements proved to be a dead end.

33. An astronomical check on timekeeping was made by a sighting tube pointed to a selected star.

34. An early form of analogue computer, the astrolabe was primarily designed to solve problems of spherical trigonometry to shorten astronomical calculations.

35. Their written language was the most advanced of the pre-Columbian scripts, and their astronomical knowledge beyond compare.

36. For instance, suppose an astronomical theory is to be tested by observing the position of some planet through a telescope.

37. This book is a first-hand account of the most tremendous enlargement of astronomical science, written by its foremost pioneer.

38. Its existence casts doubt on the current astronomical theory of the distribution of galaxies and the large-scale structure of the universe.

39. The asteroids all lie between 2.2 and 3.3 astronomical units from the sun.

40. Some arguments against Copernicus based on astronomical considerations have been mentioned earlier in this book.

41. First discovery of things astronomical has become a matter of national pride.

41. Sentencedict.com is a sentence dictionary, on which you can find nice sentences for a large number of words.

42. But it reflects the astronomical consensus of what probably did happen.

43. Now that it is, try thinking about what is happening in astronomical terms and you will instantly notice the symbolic importance.

44. But the atmospheres of the Jovian planets contain astronomical amounts, and high concentrations, of both helium-3 and deuterium.

45. He stayed for weeks, ran up astronomical phone bills, and then vanished.

46. He began to seek further alignments which might relate to far more subtle astronomical changes - and found them.

47. The gas falls into clumps, eventually producing stars, galaxies and all the other astronomical paraphernalia.

48. Are you ready for the International astronomical year, 2009.

49. He is engaged in astronomical research.

50. It leads to the dramatic advances in astronomical photography.

51. Real - time holography requires astronomical amounts of bits.

52. He was too poor to buy an astronomical telescope.

53. the astronomical costs of land for building.

54. The cost will be astronomical.

55. They mounted an astronomical telescope on the roof.

56. There are differences between historical and astronomical numbering of years.

57. There is a small network of rhombus in Tokyo Astronomical Observatory.

58. There is the time of the summer solstice an astronomical twilight lasting throughout the whole night.

59. Automatic focusing(AF) technology plays an important role in modern astronomical telescopes.

60. Cerro Paranal, in the Chilean Atacama Desert, is considered one of the best astronomical observing sites in the world.