youtor.org
Sidereal Day versus Solar Day
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Video Source: www.youtube.com/watch?v=WWw4JY2dNXM
Earth physically rotates in 23hours 56min relative to distant stars – a Sidereal Day, BUT it takes 24hours to rotate relative to the Sun – a Solar Day • The difference? Earth orbits the Sun, so the Sun appears to move (down, in the vid), which means Earth needs +4mins to catch up! • Imagery from: NASA / Solar System Scope processing https://www.solarsystemscope.com/text... under CC BY 4.0 • NASA ephemeris data: https://ssd.jpl.nasa.gov/horizons.cgi...
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