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 .
This is called the solar day. But the actual period ofâ¦ rotation is less, about 23 hours and 56 minutes. This is in relation to the fixed stars and is called a sidereal day. A solar day is the time it takes for the Earth to rotate so that after one rotation the Sun is in exactly the same position relative to Earth.