Remote Agent

How are remote agents used?

Why don't we just send astronauts on deep space trips?

There are several reasons we do not do this:

Why was Remote Agent chosen to go on DS1?
What are the advantages of remote agents?
What happens to a ship when its remote agent dies?
How does NASA run space missions?
What is the New Millennium Program?
What will DS1 do on its mission?

Why is mass (weight) important?
Why do space missions take so long?