The University of Canterbury may have an astronaut in their midst if one of their chemistry academics continues down the NASA process.

Post-doctoral fellow Dr Sarah Kessans is in the top 120 from over 18,000 applicants and has just completed interviews with NASA in Houston, Texas.

Dr Kessans said it was the most incredible week of her life.

"The entire team there at NASA is just an incredible team. So to be a part of that team and to be working towards some of the goals that NASA is working towards -- space exploration and research -- would be an incredible dream come true."

Dr Kessans said she thinks she is still in the running for an astronaut spot, but knows it comes down to what NASA wants in a candidate.

"I think it really just comes down to what NASA is looking for and what kind of skill set that they need.

"If they need a biochemist with an adventurous background, then they'll take me. If they're looking for a pilot then that's obviously not who I am. I don't know if that's who they're looking for, but I'm really hoping they are.

Dr Kessans should hear at the end of November as to whether she has progressed to the next stage of the top 60.