A Brief Introduction to Astronomy, by Question and Answer
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A Brief Introduction to Astronomy, by Question and Answer

A Brief Introduction to Astronomy, by Question and Answer


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Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: Q. What is the difference in winter ? A. In winter, the rays of the Sun hcive to come through a much colder region, and fall more obliquely on the surface of the Earth. Q. Is there any other cause besides those ? A. Yes; the day being so much longer in summer than in winter, a greater proportion of rays comes on through the day than can go off through the night; which, with the additional heat daily imparted, makes it increase even after the solstice or longest day. Q. Is it from the same cause that we find July hotter than June, and the day hotter at two o'clock in the afternoon than at mid-day ? A. Yes; it is from the same cause. OF THE GREAT CIRCLES. Q. What is a Great Circle ? A. One that divides the globe into two equal parts. Q. How many Great Circles are there ? A. Six; the Equator, the Braxen Meridian, the Horizon, the Ecliptic, and the two Colures, Q. How does the Equator divide the globe ? A. Into northern and southern hemispheres. Q. How does the Meridian ? A. Into eastern and western hemispheres. Q. How the Horizon ? A. Into upper and lower hemispheres, or into sensible and rational Horizons. Q. What is the Sensible Horizon ? A. That line which terminates the view. Q. What is the Rational Horizon ? A. That which applies to the rising and setting of the Sun, Moon, and Stars, and is represented on the artificial globe by the Wooden Horizon. Q. How does the Ecliptic cut the globe ? A. Obliquely; the obliquity of which is nearly twenty-three and a half degrees. Q. Why is it called the Ecliptic ? A. Because in it all Eclipses, both solar and lunar, take place. Q. What is the Zodiac ? A. It is an imaginary broad circle or belt surrounding the heavens, extending about eight degrees on each side of ...


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Product Details
  • ISBN-13: 9780217156844
  • Publisher: General Books
  • Publisher Imprint: General Books
  • Height: 246 mm
  • No of Pages: 28
  • Spine Width: 2 mm
  • Width: 189 mm
  • ISBN-10: 0217156843
  • Publisher Date: 14 Jan 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 68 gr


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