The newlyweds are "as excited as eloping teenagers," the retired astronaut wrote on social media when announcing the nuptials.

It’s been half a century since humankind first landed on the moon. When astronaut Neil Armstrong took the first step in 1969, over half a billion people were watching at home for the climax of a Space Race between nations. Twelve people walked on the lunar surface as part of the Apollo missions, and today a new race to return to the moon is underway.

The moon plants grew more slowly than seedlings planted in fake moon dirt from Earth.

The retired astronaut, who was the second person to walk on the moon, developed a simple strategy to protect himself.