re: Saturn by 1970
As much as I'd love it, a buncha mini-micro probes to Saturn's moons would be very difficult with our present technology. Need multiple landers weight and fuel, heavy even with the low gravity of the moons the orbital and landing etc. delta Vees add up. An then you need some type of radio-nucletide power source, not light either.
It's a task for the 2nd quarter of this century.