Twenty years ago today, Mae Jemison, physician and NASA astronaut, became the first black woman to travel in space aboard the Space Shuttle Endeavour. Jemison has launched 100 Year Starship, an ambitious project to encourage interstellar travel through the exchange of creative ideas. The organization will hold a public symposium in Houston this week.

When Jemison was an undergraduate at Stanford University, her roommate was Linda Lorelle, who went on to become a KPRC-TV anchor. We asked Lorelle, moderator of PBS' "Red, White and Blue," to interview Jemison about her career and space travel. Excerpts follow:

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