An American physicist, astronomer, and astronaut, born in Chicago, Illinois, to Ernest Grunsfeld Jr. and Sally Mays. He is also the grandson of the architect Ernest Grunsfeld. He appeared in the documentary film Hubble (2010) and the documentary series Mars (2016).
An American physicist, astronomer, and astronaut, born in Chicago, Illinois, to Ernest Grunsfeld Jr. and Sally Mays. He is also the grandson of the architect Ernest Grunsfeld. He...Read more appeared in the documentary film Hubble (2010) and the documentary series Mars (2016).