Flying 220 miles above the Earth aboard the International Space Station, NASA astronaut Greg Chamitoff is ready to take your questions.
The public can now submit inquiries to Chamitoff and get answers direct from space on NASA's Web site.
Mission Control will transmit the questions to Chamitoff weekly. He will answer as many as his schedule will allow. Check back periodically to the link above for the transcript and audio clips of the astronaut's answers.
Chamitoff is a flight engineer for the Expedition 17 mission. He flew to the station aboard the space shuttle Discovery in June and will return to Earth aboard shuttle Endeavour in November.