The Earth's rotation is the rotation of the solid earth around its own axis, which is called Earth's axis or rotation axis. Image File history File links Rotating_Earth. ... Rotation of a plane, seen as the rotation of the terrain relative to the plane (exposure time 1. ... Earth (often referred to as the Earth) is the third planet in the solar system in terms of distance from the Sun, and the fifth in order of size. ...

Rotation period

The average rotation period of the Earth is called "sidereal day". Its value is In astronomy, a rotation period is the time an astronomical object takes to complete one revolution around its rotation axis. ... On a prograde planet like the Earth, the sidereal day is shorter than the solar day. ...

 23 h 56 m 4.091 s 

and describes the rotation with respect to the cosmic background of the stars. In contrast to this, the rotation with respect to the Sun is 24 hours, because we are revolving around the sun once per year. Per day the difference is
86 400 s / 365.25 = 236 seconds = 3 m 56 s (as can be seen above). The hour (symbol: h) is a unit of time. ... A minute is a unit of time equal to 1/60th of an hour and to 60 seconds. ... Look up second in Wiktionary, the free dictionary. ... The term background can have any of the following meanings: Background (computer software) refers to software that is running, but not being displayed. ... The Sun is the star at the center of our solar system. ...

This must not be confused with the length of day (abbrev. LOD), which the IERS defines as the difference between the astronomically determined duration of the day (relative to the Sun) and 86,400 SI seconds.^[1] The International Earth Rotation Service (IERS) is the body responsible for maintaining global time and reference frame standards, notably through its Earth Orientation Paramater (EOP) and International Celestial Reference System (ICRS) groups. ...

References

1. ^ Universal Time (UT1) and Length of Day (LOD)

External links

• Weather Makes Earth Wobble - the first study to demonstrate that day-to-day changes in atmospheric pressure produce a measurable effect on Earth's rotation.