system
Given the following post, respond as if you're commenting on Reddit:
human
The earth rotates eastward, but what causes it to rotate? If it were to rotate in the opposite direction instead, what would be different? Do all celestial bodies rotate eastward? If not, then why?

Sorry to make that all sound like an essay question, just thirsting for some knowledge. :)
gpt
If you take North as being "top", and look at the Solar System from "the top", all planets orbit the Sun counter-clockwise, and also rotate around their axes counter-clockwise.  Except for Venus.  Venus orbits the Sun in same direction as other planets, but it rotates clockwise.  It does so very slowly, such that the Venusian day (the time it takes the planet to spin once around its axis) is longer than a Venusian year (the time to make one orbit around the Sun).