How little we knew, and how much we still don’t.
It’s routine today to use planetary gravitation to “slingshot” spaceships and probes; you see it even in old Star Trek flicks. How odd, then, to find that the technique was not fully conceived until the 1960s. These are the voyages of the star probes Voyager.
What they showed us, and how it was done; a fascinating journey through time and space that continues to this day as they move for the first time in human history into true interstellar space.
Prepare to be amazed.