Happy 30th Birthday, Pioneer 10
tlon writes: "Pioneer 10, the spacecraft that brought us the first pictures of Jupiter, turned 30 today. Launched in 1972, the probe is now some 7.4 billion miles away, as it cruises out towards Aldebaran, the eye of Taurus. NASA will attempt to contact the spacecraft today, (it was successfully contacted last year), but the round trip time is over 22 hours. How's that for a ping latency? See Nasa's Pioneer 10 Page for more details."
If they do actually manage to contact the probe, that would be very, very cool. They don't build 'em like this anymore, gentlemen - all you need to do to see that is look at the Mars probes. What's really goofy is how now, one of the farthest man-made objects from Earth is completely, mind-bogglingly obsolete from a computing standpoint.
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Imperium et libertas
Autocracy and freedom
The amazing thing is that the satellite is sending out a signal with as much power as maybe a watch battery, and we're receiving it from over 10^9 km away...
Of course, the receiving dish is as big as a football field, but still.
why contact it? Whats it going to say? Still dark. Still dark. Still dark.
Imagine if one day we *do* see an extraterrestrial probe land here. As far advanced as it will appear to us, it may only be an ancient relic of its creating civilisation.
Decentralization: the brief interval between the decline of one centralized regime and rise of another.
Two major problems:
First, hardware fails occasionally. The probes would have to be able to send their signals back at least two hops in order to avoid having one failed probe "orphan" many others.
Second, the trajectories rely upon a particular alignment of planets. If we sent out probes year after year, they'd end up going in completely different directions.
Tarsnap: Online backups for the truly paranoid
Yes - but we only found out about that in 1977 - 5 years after Pioneer was launched.
"E pur si muove!" - attributed to Galileo Galilei, 1564-1642
Pioneer 10 has responded!