tostr_culturaltutor on Nostr: This seven day week spread and eventually reached the city of Alexandria, a centre of ...

This seven day week spread and eventually reached the city of Alexandria, a centre of astronomical study.

There they named the days after the "Seven Celestial Bodies", the seven astronomical objects in the sky (other than stars) which can be observed by the human eye: https://t.co/IgL0rhtuET (source: https://twitter.com/culturaltutor/status/1630001023384207361)