Sidereal Day versus Solar Day

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...