In the second episode of the Facebook Watch series " Spacing Out with the Everyday Astronaut ," which premieres Saturday (May 19), host Tim Dodd revels in the awesomeness of SpaceX's first-stage rocket landings and explains some of the physics involved.

"Everyday Astronaut" Tim Dodd beholds a landed Falcon 9 first stage and SpaceX headquarters in Hawthorne, California.

Credit: MadWest Content/Jupiter Entertainment To date, SpaceX has landed 25 Falcon 9 first stages during orbital missions and re-flown such boosters 11 times.

These activities are part of the company's effort to develop fully and rapidly reusable spaceflight systems, technology that SpaceX founder and CEO Elon Musk has said could help open the heavens to exploration.

Dodd, a photographer by trade, created the Everyday Astronaut persona after buying an orange Russian flight suit in an online auction in 2013.

Dodd started the project on a lark, but it has blossomed into a wide-ranging art and education effort that takes him around the world — and, now, onto your computer or smartphone screen.

The first episode of "Spacing Out" featured Dodd trying to simulate a "Marswalk" here on Earth , using balloons in an attempt to make himself as light as he'd be on the Red Planet's surface.