Great Year

Great Year

Edited by 

List price: US$48.00

Currently unavailable

Add to wishlist

AbeBooks may have this title (opens in new window).

Try AbeBooks

Description

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. In the history of astronomy, a Great Year often refers to one complete precession of the equinox, but may also refer to any real or imagined cycle with astronomical or astrological significance. The most common Great Year is the time required for one complete cycle of the precession of the equinoxes, presently about 25,765 years. The Greeks sometimes called the period of time required for the naked eye planets to realign, a Great Year; this was an important concept in ancient Stoicism. The duration of the precession cycle, the time it takes for the equinox to precess 360 degrees relative to the fixed stars, is often given as 25,920 or 26,000 years. In reality the exact duration cannot be given, as the rate of precession is changing over time. This speed is currently 243.8 microradians per year which would give 25,765 years for one cycle to complete.show more

Product details

  • Paperback | 96 pages
  • 152 x 229 x 6mm | 150g
  • Lect Publishing
  • United States
  • English
  • 6134995177
  • 9786134995177