Steven Lee Smith is an American technology executive and former NASA astronaut, being a veteran of four space flights covering 16 million miles and seven spacewalks totaling 49 hours and 25 minutes. Smith’s spacewalk time places him in the top ten on the all-time American and World spacewalk duration lists.

The primary objective of STS-103 was the Hubble Servicing Mission 3A. STS-103 had four scheduled Extravehicular Activity (EVA) days where four crew members worked in pairs on alternating days to renew and refurbish the telescope.