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Pioneer Program
2009-07-06 12:24:05

The Pioneer Program is a series of American unmanned space missions designed for planetary exploration. The program included a number of missions, but the most well-known missions were Pioneer 10 and Pioneer 11. Both Pioneer 10 and 11 explored the outer planets and left our solar system. Both probes carry a gold plaque, depicting a man and a woman and information about the origin of the probes...

Word of the Day
saggar
  • A ceramic container used inside a fuel-fired kiln to protect pots from the flame.
The word 'saggar' may come from 'safeguard'.
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