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.
From one meridian passage of the Sun to the next, the Earth has to therefore rotate approximately 361 degrees. A solar day is therefore 4 minutes longer than a sidereal day. If measured using the sidereal day as the unit of time, the Sun's meridian passage would occur about 4 minutes later each day.