尼爾‧阿姆斯壯於1969年7月20日登上月球時說：「這是我的一小步，卻是人類的大躍進。

出處: Armstrong, Neil. "Astronaut Edwin E. Aldrin, Jr., Lunar Module Pilot of the First Lunar Landing Mission, Poses for a Photograph beside the Deployed United States Flag during an Apollo 11 Extravehicular Activity (EVA) on the Lunar Surface." July 20, 1969 courtesy of National Aeronautics and Space Administration.