Earth rotation
E21210
Earth rotation is the spinning of our planet on its axis, which produces the cycle of day and night and underlies the measurement of time.
Statements (52)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical phenomenon
→
physical process → rotational motion → |
| affects |
Coriolis effect
→
Foucault pendulum precession → ocean currents → trade winds → weather patterns → |
| angularVelocity | about 7.2921159×10^-5 radians per second → |
| causes |
centrifugal acceleration at equator
→
cycle of day and night → equatorial bulge of Earth → flattening at Earth poles → |
| defines |
Earth day
→
sidereal day → solar day → |
| equatorialLinearSpeed |
about 1670 kilometers per hour
→
about 465 meters per second → |
| hasApproximatePeriod |
23.934 hours
→
86164 seconds → |
| hasAxis | Earth axis → |
| hasType |
sidereal rotation
→
solar rotation → |
| historicallyExplainedBy |
Copernican system
→
surface form: "Copernican heliocentric model"
|
| influences |
Earth’s gravity field
→
Earth’s shape → |
| isDescribedBy | angular velocity → |
| isFundamentalFor |
astronomical coordinate systems
→
civil time → time zones → timekeeping systems → |
| isMeasuredBy |
Very Long Baseline Interferometry
→
atomic time comparisons → satellite laser ranging → |
| isObservedWith |
Foucault pendulum
→
star trails in long-exposure photography → |
| isSlowingDown | true → |
| occursOn | Earth → |
| referenceFrame |
distant stars
→
inertial frame → |
| requiresCorrection | leap seconds → |
| rotationDirection |
counterclockwise as seen from north celestial pole
→
prograde → west-to-east → |
| siderealDayLength | 23 hours 56 minutes 4 seconds → |
| slowdownCause |
gravitational interaction with Moon
→
tidal friction → |
| slowdownRate | about 1.7 milliseconds per century → |
| solarDayLength | 24 hours (mean solar day) → |
| underlies |
definition of a day
→
measurement of time → |
| wasDebatedIn | Scientific Revolution → |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.