You need to be in the position where it is the cost of the fuel that actually matters and not the cost of building the rocket in the first place.

Nothing is impossible; there are ways that lead to everything, and if we had sufficient will we should always have sufficient means. It is often merely for an excuse that we say things are impossible.

I know many books which have bored their readers, but I know of none which has done real evil.

Action speaks louder than words but not nearly as often.

A constellation is not an entity at all, not the kind of thing that Uranus, or anything else, can sensibly be said to 'move into.'