The reason for the seasons, solstices and equinox

Earth is tilted 23.4 degrees: our north pole points to a star called Polaris. Next week our tilt, combined with Earth's position in orbit relative to the Sun, gives the northern hemisphere its shortest days and least intense sunlight of the whole year. This vid is made for the northern hemisphere, here is the animation for the southern hemisphere: • The reason for the sea...
While the length of time exposed to sunlight is pretty clear from the video, the reason the intensity changes may not be:
Near the edges of Earth as observed from the Sun, more surface area is being presented to a given sunbeam than it is near the middle. In other words light near the edge is diluted over a wide area. So in the winter hemisphere you are moving into a more 'diluted' place for sunlight

[@El.Duder-ino]

Excellently explained, thank u!

[@bager4e1]

Perfect and simple video! It will be amazing to make a video about the sidereal and tropical year. Also for Earth precession and moving of the equinoxes points along the ecliptic.

[@davidlan544]

Good video ! Nice to watch

[@1gruntusmc]

Great work on showing the seasonal changes via earth tilt and rotation in a year.

[@redradoa]

Very interesting video that explains graphically a concept that, after watching it, becomes very clear. Thank you. P.D. I cannot understand why it hasn’t got more views.

[@haritdimara112]

commented here on 2024 march equinox