If he dates around the 2nd century BC, I don't find anything he said to be unique to him. Perhaps I'm missing something.
The most recent date, 150 B.C. would correspond to the first proposal of orbits by the Greeks. Much earlier, the moon is proposed to be reflecting sunlight.
The main Jewish/Greek philosopher of the earlier period was Philo. And I believe he would have either written in Hebrew or Greek.
On top of the relatively new Greek ideas of reflected light and orbits, Enoch also includes several other curious statements (from my post above):
And then there is a reference to the end of all that there is (and beginning) which sounds like a singularity: in chapter 18 a place with no measure and no content, a pit "where the heavens come together." He records that the angel explained [v. 14] "this is the ultimate end of heaven and earth; it is the prison house for the stars and the powers of heaven "
Of course, the first question in evaluating such a text is whether the peculiar information could have been known to the original scribe of Enoch and the next, how?