Since April 5th 2010, four women are in space at the same time. That's a new record. Dorothy Metcalf-Lindenburger, a former high school teacher, Stephanie Wilson, a robotic arm expert, and Naoko Yamazaki, an aeronautical engineer and the second Japanese woman ever to reach space, and Tracy Caldwell Dyson, a chemist, met in the international space station on April 6th.

Out of the 517 people who have reached orbit, 54 are women. That's 10.4%, an impressive number compared to the less 7% women pilots.

Valentina Tereshkova from the ex Soviet Union was the first woman to reach space in June 1963 followed by Sally Ride from the United States in June 1983. Eileen Collins from the United States was the first woman to pilot a space vehicle in 1995 and the first to command a space mission in 1999.