"We are potentially building a new spacecraft. I would love to be a part of that. Building a new vehicle is always benefited by people who have experience.
"All this is in the short term. But eventually, when I grow up, I would like to be a school teacher, a science school teacher," Williams told reporters after an interaction with school students at the Nehru Science Centre here.
"But I think talking about space with as many people as possible and relaying my experiences is my main mission for a while," she said.
"For me, it would be a dream to go back to the moon. It would be awesome to go to Mars, but I have a feeling that in my life as a professional astronaut, that might not happen," she said.
On Indo-US collaboration in space, she said, "I have been at the NASA. I have seen a growing relationship between the US and India. I think that's great. I have also seen the growing relationship between ISRO and NASA and that is also great."