Answer:
I am a portal to another world which you cannot enter. Only you can see me but I can't see you.
Angels and pilots work with me.
I come without being fetched at night hides away as soon as daylight strikes. Although I may look small I am much mightier than what you can imagine.
What is it called when a cat wins a dog show?
I am owned by the poor the rich does not need me. If you eat me you will die!
What is lighter than what it is made of?