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 .
Since the planets spin on their axes at different rates and travel about the Sun at different speeds as well, the length of one day is different for each planet. For example, on Earth the length of a solar day is 24 hours.But because of its slow rotation and its rapid orbital speed, one solar day on Mercury lasts about as long as 176 days on Earth.ur sidereal day is 23 hours and 56 minutes, which is so close to our solar day that we often fail to distinguish between the two. A sidereal day is the length of time which passes between a given fixed star in the sky crossing a given projected meridian (line of longitude).