In the video, the host of the long-running show points out that much of the technologies we rely on in our daily lives come from those developed by NASA for space exploration.
With the new video, Trebek joins celebrities such as musicians Will.i.am and Norah Jones and comedian Stephen Colbert in telling audiences how NASA-related technology, or spinoffs, benefit life on Earth.
"It's an honor to add Alex Trebek to our list of space technology spinoff supporters," NASA Chief Technologist Mason Peck said.
"NASA technologies work for us here on Earth, solving everyday problems -- saving lives, creating jobs and making our lives better," he said.
The Trebek video will air on NASA Television and the agency's Web site.