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This is the time it takes Earth to rotate 76.67 cm (30.19 in), as measured at the equator. This means that today lasts: 23.9999995421 hours or; 24 hours minus 1.65 ms; On average, a mean solar day in the last 365 days was -0.09 ms under 24 hours, so today's day length is below average.
Online Earth Rotation Service. NASA Goddard Space Flight Center Geodesy and Geophysics Laboratory. NERS Web interface. Available range: [1975.12.31-23:59:59.9 , 2024.07.05-00:01:14.0 ] TAI Date: Format: YYYY.MM.DD_hh:mm:ss.sss or Now. Parameter.
Calculate the speed of Earth's rotation by observing the night sky - BBC Sky at Night Magazine. Test how long it takes Earth to rotate by studying the stars. Observing a favourite star and a bit of maths proves Earth’s spin takes less than 24 hours.
Earth rotates once in about 24 hours with respect to the Sun, but once every 23 hours, 56 minutes and 4 seconds with respect to other distant stars ( see below ). Earth's rotation is slowing slightly with time; thus, a day was shorter in the past. This is due to the tidal effects the Moon has on Earth's rotation.
Check Earth's speed on the map. How fast does the Earth rotate at a given latitude (mph, km/h, m/s, yd/s). Equations, formulas, lists, tables.
Web interface to the Network Earth Rotation Service. It displays selected parameters of the Earth's rotation at the specified epoch. Real time Earth rotation service. Shows the Earth orientation now based on the forecast.
Calculator for the duration of a rotation (sidereal day) of Sun, Moon, Earth and planets, in hours and compared to each other. This is the time, which a celestial bodies needs for a complete rotation around its own axis.
