[PatrickHenry]

I'm not sure when it was generally appreciated that the moon shines by reflected sunlight ...

I'm not sure what the Hebrews knew of such things, other than what appears in scripture, but the Greeks had all that stuff figured out by the time of Aristotle (around 300 BC), if not before. It seems quite obvious that they knew a lunar eclipse was caused by the earth's shadow. They determined the shape of the earth by the fact that it always casts a circular shadow on the moon during an eclipse (and only a sphere always casts a circular shadow).

[Alamo-Girl]

Very interesting! I presume you are saying that Aristotle believed the moon was reflecting light from the sun. Do you have a reference or clue to help me find that?!

[Right Wing Professor]

So presumably the writer of Enoch must have been familiar with Greek philosophy. I suppose that's not too much of a stretch if it's dated at 200 BC; at the time, the Eastern Mediterranean was hellenized, and people traveled pretty freely.

Chaps. 72-82 The Astronomical Book, like the Book of Watchers, may date from the third century BCE; the oldest copy of it seems to have been made not long after 200 BCE. Sizable portions of the text are preserved on four copies, written in Aramaic, from Qumran cave 4. The Aramaic original appears to have been much different and much longer than the Ethiopic text, adding far more astronomical details."      - James C. Vanderkam

And further

King argues that 1 Enoch is an unmistakable product of Hellenistic civilization (although its roots are firmly embedded in Mesopotamian and Persian tradition).

"A world view so encyclopaediac that it embraced the geography of heaven and earth, astronomy, meteorology, medicine was no part of Jewish tradition - but was familiar to educated Greeks, but attempting to emulate and surpass Greek wisdom, by having an integrating divine plan for destiny, elaborated through an angelic host with which Enoch is in communication through his mystical travels."

[Virginia-American]

I'm not sure what the Hebrews knew of such things, other than what appears in scripture, but the Greeks had all that stuff figured out by the time of Aristotle (around 300 BC), if not before. It seems quite obvious that they knew a lunar eclipse was caused by the earth's shadow.

Pythagoras is traditionally credited with the first proof that the Earth is a sphere. His logic was that its shadow, seen on the Moon during an eclipse is always round, no matter where in the sky or where on the Moon the eclipse is taking place. The only solid that always casts a round shadow is a sphere. QED

[Aric2000]

Or a big flat dish!! LOL ;)