Group dynamics - A term that implies that our thoughts and behavior are influenced by the groups of which we are members and, in turn, we influence the thought process and behavior of the group as a whole.
One sidereal day is the time it takes for a star in the sky to come back to the same place in the sky. Because, for all intents and purposes, the sky is âfixedâ, a sidereal day is when the earth rotates 360Â°. A sidereal day is 23 hours 56 minutes and 4.09 seconds long. A sidereal year is the time it takes for the sun to return to the same position with respect to the stars. Due to the precession of the equinoxes the sidereal year is about 20 minutes longer than the tropical year.
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).