He spoke with CBC's Paul Hunter beforehand, and hinted that his presentation for the "technology, entertainment and design" audience would be about fear.
"I think a lot of people allow many of the major decisions in their life to be dictated by fear ... rather than actually trying to dig into it and see why they're afraid and figure out maybe a coping mechanism, like we have to do [in order] to do a spacewalk or fly a rocket ship," Hadfield said.
We've learned a whole methodology of how to get around your fear to accomplish something that otherwise you would have been denied."
Though it cost audience members $7,500 to hear the talk in person at the Vancouver Convention Centre, and $600 for online viewers, many others were able to watch Hadfield's presentation without paying a cent at a number of free viewing venues around Metro Vancouver and Greater Victoria.
What do you think? If you saw Hadfield's presentation, other Monday speakers or end up watching other TED talks this week, tell us your favourite moments in the comments sections below.
Did anything you've seen rank with the best of TED?
See below to compare with the top 5 most-viewed TED talks of all-time, according to TED.com:
1. Ken Robinson: How schools kill creativity (2006)
Author and international leader Sir Ken Robinson PhD, makes a case for an education system that nurtures creativity.
2. Amy Cuddy: Your body language shapes who you are (2012)
A musing on how body language and self-perception may have implications on confidence and chances for success.
3. Simon Sinek: How great leaders inspire action (2009)
A conversation about how leaders can inspire co-operation and change.
4. Jill Bolte Taylor: My stroke of insight (2008)
Stroke survivor and neuroanatomist Jill Bolte Taylor discusses her experience watching her brain functions shut down.
5. Brené Brown: The power of vulnerability (2010)
A humorous chat from vulnerabilities researcher Brené Brown on humanity's ability to empathize and love.