Tsiolkovsky is considered one of the founding fathers of rocketry and astronautics. Long before the Wright brothers' first plane flew 120 feet, he was thinking space travel. And when it was still science fiction to most people, he was developing the theory, and doing the math, for multistage rockets.
On this day in 2006 - September 18th - Anousheh Ansari was the first woman to become a space tourist.
Ansari is an Iranian-American engineer and co-founder and chairwoman of Prodea Systems. Her previous business accomplishments include serving as co-founder and CEO of Telecom Technologies, Inc. (TTI). The Ansari family is also the title sponsor of the Ansari X Prize.