Very concise and fascinating summary of all (?) of Earth’s movements.

This is why astrology cannot work: the position of the stars on the sky keeps changing, and is certainly different since the time astrology got started. Astrological predictions have not changed to accommodate the current position of the constellations…

More interestingly, some of the variation in the Earth’s orbit explains the ice ages.

This video has gone viral through St Andrews, and we still play it in the office whenever someone feels stuck.