Apollo astronaut Gene Cernan has died.

I’m old enough to remember the first moon landing. What a time that was. Every kid wanted to be an astronaut. We drank Tang and ate Space Sticks and anything that was freeze dried. We built plastic models of the lunar module. It was the start of a bold new world of human exploration of space.

And then it all stopped.

Now there are just a handful of humans who’ve set foot on a chunk of rock other than earth. On Monday we lost one of those few, Gene Cernan. Here’s NASA’s profile of him. Rest In Peace.

There are now six people who’ve walked on two worlds:

Buzz Aldrin
Alan Bean
David Scott
John Young
Charles Duke
Harrison Schmitt

A sad day.