Answer:
I direct you from outer space.
I am owned by every man, though my length differs. Their wives use me after getting married. What am I?
What is eaten but can also eat?
I have all the knowledge you have. But I am so small that I can fit into your hands. What am I?
The more you have me, the less you see. Shine a light on me and I flee. What am I?
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.