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25-06-2013 8:49 PM
Pioneer pl...
Pioneer 10 and Pioneer 11. It carries an information-rich message, devised by Carl Sagan and Frank Drake, in the event that either of the spacecraft is detected and recovered in the remot...proton and electron spins in the neutral hydrogen atom. It is this transition which is responsible for the 21-centimeter line (giving a standard distance) at 1,420 MHz (giving a standard time) by...binary (1---) between two tote marks, indicating the height of the Pioneer probe. The fa...pulsars, which are very precise and slow down, over long periods of times, at a predictable ra...
