Flight Engineer Mikhail Tyurin (Russia) assisted by caddy Commander Michael Lopez-Alegria (USA) teed-off during a six-hour spacewalk outside the International Space Station (ISS) on 23 February 2006. Element 21 Golf (Canada) paid an undisclosed sum for the stunt, which was permitted by the Russian space agency as a means of raising cash. NASA estimated that the ball would orbit for three days before burning up in the atmosphere a distance of 2.02 million km (1.26 million miles). The Russians put their estimate at 740 million km (460 million miles)!
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