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ISS024-E-016350

ISS024-E-016350

(16 Aug. 2010) --- NASA astronaut Doug Wheelock, Expedition 24 flight engineer, enters the Quest airlock of the International Space Station as the session of extravehicular activity (EVA) draws to a close. During the...
Word of the Day
pawl
  • A pivoted catch designed to fall into a notch on a ratchet wheel so as to allow movement in only one direction (e.g. on a windlass or in a clock mechanism), or alternatively to move the wheel in one direction.
The word 'pawl' probably comes from a Latin word meaning 'stake'.
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Quote of the Day
My goal is simple. It is complete understanding of the universe, why it as it is and why it exists as all.

- Stephen Hawking
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