Space Adventures, a Virginia company that arranges passage for wealthy explorers to ride on Russian Soyuz rockets to the International Space Station, They are now planning to buy a Soyuz flight all its own in 2011, with the option of buying more.

One of the people onboard the 2011 flight will be Sergey Brin, a co-founder of Google. He made a $5 million investment in the company that will serve as a deposit on a future flight.

Space Adventures, the only company that sends tourists to space, has sent five of them so far. But its continued ability to provide these orbital experiences has been a subject of speculation recently.