And that card was sent from less than 20 years after we learned how to put anything into space. Think about how much more "Think about how much faster CPUs wil

And that card was sent from less than 20 years after we learned how to put anything into space. Think about how much more "Think about how much faster CPUs will be in 2018!" -- late 1990s Laser propulsion, anti matter drives, fusion drives All of which require significant breakthroughs in physics or materials engineering that may not come. There is no fundamental law of the universe that says we can have these things, or that they will ever be of practical use. You can't extrapolate from 50 years of modest success with chemical rockets.