From the sources in my monograph The Sun's Path at Night, we see that all the Rishonim, without exception, as well as many Acharonim, accepted that Chazal believed that the universe is a solid dome above the earth.
How the Firmament was understood by our Sages
From the sources in my monograph The Sun's Path at Night, we see that all the Rishonim, without exception, as well as many Acharonim, accepted that Chazal believed that the universe is a solid dome above the earth.