Either Isaiah was an inspired prophet or he was an excellent astronomer. 2700 years ago, he stated that the moon was 1/7 as bright as the sun (cf Is. 30:26). Current measurements of the moon's reflectivity (albedo) match this claim to within 5% accuracy. Pretty cool :). Can't claim that this was written later & injected into the Bible, since the oldest copies of the book of Isaiah are dated 600 years BC. Pretty friggin cool, if you ask me.
Check Albedo information here:
http://en.wikipedia.org/wiki/Albedo
and the moon's characteristics here:
http://en.wikipedia.org/wiki/Moon
And compare to Isaiah's prophecy:
http://www.biblegateway.com/passage/?search=isa%2030:26&version=NASB
