I have many alert readers - smart, too. One is in the aerospace world, and recently sent me news that the Voyager spacecraft just left the solar system after travelling nearly 12 billion miles in 36 years.
This is astounding for the uninformed (like me). And curmudgeons don't get impressed all that often (a condition of the job). It is even more astounding that Voyager still faithfully sends pictures back using the most modern memory system of the day: an 8-track tape machine with 1/240,000th the memory of my iPhone and a 23-watt transmitter (think 3 nitelights).
Voyager was designed for a 4-year trip to Saturn with anything after that "gravy." That's certainly a lot of gravy.
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