Why does Earth rotates at its axis?
See the previous answer as well regarding the angular momentum. it would actually be amazing if there was no rotation whatsoever, it would mean that all the particles and bits ending up forming earth would’ve met together and by coincidence exactly cancel out eachothers momentum. the planets in our solar system all rotate in one way or the other, around the sun and around their own axis (some slow, like venus, a venus-day is longer than a venus-year) sometimes the axis is almost perpendicular to the sun (like earth, mars, giving colder north/south poles and night and ‘day’) but uranus is almost spinning flat, so ‘night and day’ there do not depend on its own rotation but only on the rotation around the sun. The earth actually is slowing down because of various reasons (moon and tides , energy dissipation) but it’s obviously not something we’ll have to worry about for quite a while..
