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An Essay Towards a History of the Principal Comets Since 1742

An Essay Towards a History of the Principal Comets Since 1742


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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1769. Excerpt: ... Messier, he is so constantly on the look out, and so dextrous in discovering them, that it would inelineone to believe with Cassini, that there was really a zodiac of Comets, and that M. Messier alone knew its place and limits in the heavens. The first Comet of this year was discovered ac the Marine Observatory at Paris, March the 8th, in the constellation of Pisces and observed till the 15th of the same month; its motion was retrograde, and it seem'd in size, equal to a star of the fourth magnitude. The second Comet was at first discovered with the naked eye, April the 8th, near the Pleiades and promised to become considerable. The nexc day the tail was six or seven degrees long, and the nucleus equally luminous with stars of the third magnitude. It was however visible only till the 12th. M. Messier sent tables of the places of these Comets to the Royal Society this year, together with a calculation of the elements of their orbits by M. Pingre. The second of these two Comets was discovered at LoUisburg, in the island of Cape Breton, Aprit the 7th, which was one day sooner than even M. Messier had seen it at Paris. In this observation, made by Captain Holland, the tail of the Comet appeared perpendicular to the horizon, with its head towards the sun. Mr. Brice observed the same Comet atKirknewton, April the 10th. It was then descending towards the sun, at the rate of about six degrees in the space of twenty-four hours. To this gentleman's man's account, in the Philosophical Transactions, ii prefixed a plate of the appearance of the Comet. 1769. The first intelligence we had of this Comet in England, was from the indefatigable M. Messier, astronomer, keeper of the journals, plans and maps belonging to the marine of France, who discovered it the 8th of Aug...


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Product Details
  • ISBN-13: 9781151732033
  • Publisher: General Books
  • Publisher Imprint: General Books
  • Height: 246 mm
  • No of Pages: 24
  • Spine Width: 1 mm
  • Width: 189 mm
  • ISBN-10: 1151732036
  • Publisher Date: 01 Feb 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 64 gr


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