Ron Torell, former University of Nevada Extension livestock specialist now retired, wrote a few years back that most cows pay for themselves by age six. âThus, the longer a cow stays in the herd, the more profitable she becomes.
Naturally, these hours, minutes, and seconds are shorter than the solar hours, minutes, and seconds you are familiar with. One solar day is 24 solar hours long, and one sidereal day is 24 sidereal hours long, but one sidereal day is 23 solar hours and 56 solar minutes long. This exercise was based on a help section of CyberSky. A shareware version of CyberSky is available from http://www.cybersky.com .
Using the Celestial Sphere as the reference is called Sidereal Time. A Sidereal Year would be the time it takes for the same reference star to be in the same position overhead at the Vernal Equinox A Sideral Year is slightly longer than a normal year (a Solar Year) it takes approximately 365.2465 days.