Sigh. If there's one person who we think might be known by just about EVERYBODY on the planet, astronaut Neil Armstrong would be one of them.

Armstrong, died on Saturday
reportedly due to complications from surgery. And sadly, some people on Twitter, have been posting "Who Is Neil Armstrong?"

Well, youngster, let us teach you. Neil Armstrong was the first man to walk on the moon. We'll just give you a minute to let that sink in.

He is not, repeat NOT, Lance Armstrong, the controversial U.S. cyclist who made headlines recently.

Neil Armstrong, along with fellow astronauts Buzz Aldrin and Michael Collins, blasted off from Cape Canaveral in Florida on July 16, 1969 and landed on the moon (ON THE MOON!) on July 21, 1969. It looked and sounded something like this:

So there ya go. Neil Armstrong. Astronaut. First man on the moon. You're welcome. Now get back to that history textbook.

See More "Who Is Neil Armstrong?" tweets and reactions below:

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