The Fourth Motion of Matter

3 min readDec 5, 2022

It’s the one motion we are involved in that is not based on gravity!

Photo by Arnaud Mariat on Unsplash

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…