Kate Upton's 'Zero Gravity' Swimsuit Photos

 Upton was featured in an incredible photoshoot for Sports Illustrated Swimsuit.

The former Rookie of the Year posed for pictures while "floating in space."

Upton opened up about this once-in-a-lifetime experience with SI Swim.

"It's so hard to explain how it feels," Upton said.

This photoshoot that Upton participated in is part of the "zero gravity" series from SI Swim.

It took place at Cape Canaveral.