I make two people out of one. What am I?

Known by all without exception, Forever here, for your protection, Sometimes strong, sometimes weak, Right after the night I come - hot and chic. And while millions of miles away, I always get to you, I find my way. No life around could do without me, Can you guess what I might be?

What word is represented by this rebus?

What is always in front of you but can’t be seen?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

There is something which is always coming but never arrives?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

John is found dead in a bare field. Nobody killed John,
John did not commit suicide.

Inspector Jacob found a bag just a few meters away from John which could save his life. What was in the bag?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

A man looks at a painting in a museum and says, “Brothers and sisters I have none, but that man’s father is my father’s son.” Who is in the painting?