Sidereal Day versus Solar Day
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- Опубликовано: 26 окт 2024
- 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 www.solarsyste... under CC BY 4.0
NASA ephemeris data: ssd.jpl.nasa.g...