A private service for Neil Armstrong was held Friday for close friends and family.
You might say that a man like Armstrong comes around "once in a blue moon". It's a saying that has come to denote something rare, like Armstrong's ambition, fearlessness and legacy.
In a fitting nod from the universe, a so-called "blue moon" took the sky on Friday as he was laid to rest.
It means that it's the second full moon in the same month, and it only happens every few years. The next one won't be until 2015.
Doctor David Heard, a professor at Edinboro University, said the success of Armstrong's mission launched the space program into what it is today, and that this cosmic event, seen worldwide, mirrors his global influence.
"I think it's very fitting that his memorial service would be held on a blue moon, something that captures the public's attention," said Heard, "because in 1969 that's exactly what Apollo 11 and Neil Armstrong did, was capture people's attention around the world."
A public memorial is in the works, to be held in Washington D.C. in September.
Armstrong's family suggested that people pay tribute to the astronaut Friday night, by looking up at the moon, and giving a wink.