arstechnica.com | At 10:56pm EDT on July 20, 1969, American astronaut Neil Armstrong became the first human being to ever step foot on any extraterrestrial body. His initial words of “that’s one small step for (a) man, one giant leap for mankind” were heard around the world and have echoed through time ever since. Earlier today—43 years after his historic mission, a few weeks after he turned 82 years old and underwent heart surgery to relieve blocked arteries—Neil Armstrong passed away.

After his historic mission, Armstrong continued on at NASA as a manager in Washington, DC. Once he left the agency, he taught engineering at the University of Cincinnati and served on numerous corporate boards. He was part of the NASA panel that investigated both the Apollo 13 disaster and the Challenger disaster many years later.

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A hero for all mankind: Pioneer and NASA legend will be remembered for his legendary step.