Submit Your Questions Here Or Tweet #NPRSpaceJam.

On Tuesday, September 15th, at 5 p.m. ET, astronauts Serena Auñón, Cady Coleman, Samantha Cristoforetti, plus NASA chief scientist Ellen Stofan will be stopping by Skunk Bear HQ – and I’ll be asking them your questions live on Periscope and SnapChat (user: nprnews)!

Submit your questions here or tweet #NPRSpaceJam.

Cady Coleman has been to space three times, once spending 158 days aboard the International Space Station. While on earth, she set several endurance and tolerance records when she participated in tests of new equipment. She plays flute in Bandella, a musical group made up of astronauts. Here, I’ve depicted her zero-gravity hair-do.

Serena Auñón hasn’t been to space … yet. She was selected in 2009 as a member of the 20th NASA astronaut class. She has a bachelors degree in electrical engineering, a doctorate in medicine, and a masters in public health.

Samantha Cristoforetti is the first Italian woman in space, the woman who has stayed in space the longest (199 days) and the first person to brew espresso in space. She’s a fighter pilot in the Italian Air Force and speaks fluent Italian, English, Russian, German, and French.

Ellen Stofan is the Chief Scientist of NASA, advising the administrator on all things scientific. She is especially interested in the geology of other planets.