Buzz Aldrin was the second man to set foot on the moon, so he knows a thing or two about floating around and being weightless. He’s offering to experience that with you, without having to leave orbit.

A new auction from our partners at CharityBuzz gives you the opportunity to go scuba diving with Aldrin for two days on Grand Cayman Island in the Carribean. Proceeds from the bids go to Aldrin’s ShareSpace Foundation, which works to provide experiences in science, tech, engineering and math to children.

“I started diving almost 60 years ago and I fell in love with it immediately,” said Gemini and Apollo astronaut Buzz Aldrin. “I am also very passionate about inspiring children to be innovators, which we promote through my ShareSpace Foundation. This auction diving experience will raise funds to support our organization and enable us to continue to inspire the next generation.”

The auction is now open and will close at 3 PM Eastern Time on Thursday, April 28, 2016. Enter here.