The Fourth Motion of Matter
It’s the one motion we are involved in that is not based on gravity!
We are involved in four motions that we do not control ourselves.
1/ on Earth’s surface, we make one spin a day, once every 24 hours
2/ as part of the Solar System, we tour the Sun once a year
3/ as part of the Milky Way, we circle along, though our life span is too short…