It's foolish to equate "signs in the heavens" with astrology. Astrology is completely and totally untrue. Anybody who's analysed it would come to the same conclusion.

Job was a good man as far as people go but Jesus is the only one who ever lived that lived a sinless life.

We can't live good lives without the power of the Holy Spirit. Even then, we still have a sin nature that wants to be satisfied.

The Bible mentions predestination directly and indirectly.

(Ephesians 1:11 NIV) In him we were also chosen, having been predestined according to the plan of him who works out everything in conformity with the purpose of his will,

(Romans 9:22-23 NIV) What if God, choosing to show his wrath and make his power known, bore with great patience the objects of his wrath--prepared for destruction? {23} What if he did this to make the riches of his glory known to the objects of his mercy, whom he prepared in advance for glory--

Your actions aren't predetermined. People do what's in their hearts to do. Whether good or bad.