Western University is welcoming a retired astronaut as part of its Space Day festivities on campus.

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Canadian astronaut Dave Williams will deliver a keynote public talk at 5 p.m., closing out a day full of space talk at Western’s Physics & Astronomy Building.

Williams was a space mission specialist aboard Space Shuttle Columbia in 1998 and served in the same capacity aboard Space Shuttle Endeavour in 2007.

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During that mission, Williams participated in three of the four spacewalks, the highest number of spacewalks performed in a single mission.

Earlier in the week, astronaut David Saint-Jacques became the fourth Canadian to complete a spacewalk.

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