Neil Alden Armstrong was an American astronaut and the first person to walk on the Moon. He was also an aerospace engineer, naval aviator, test pilot, and university professor. Before becoming an astronaut, Armstrong was an officer in the U.S. Navy and served in the Korean War... Explore this topic

The National Aeronautics and Space Administration is the agency of the United States government that is responsible for the nation's civilian space program and for aeronautics and aerospace research. President Eisenhower established the National Aeronautics and Space Administr... Explore this topic

Apollo 11 was the spaceflight that landed the first humans, Americans Neil Armstrong and Buzz Aldrin, on the Moon on July 20, 1969, at 20:18 UTC. Armstrong became the first to step onto the lunar surface 6 hours later on July 21 at 02:56 UTC. Armstrong spent about two and a ha... Explore this topic

Cardiovascular surgery is surgery on the heart or great vessels performed by cardiac surgeons. Frequently, it is done to treat complications of ischemic heart disease, correct congenital heart disease, or treat valvular heart disease from various causes including endocarditis,... Explore this topic

Edwin Eugene "Buzz" Aldrin, Jr. is an American astronaut, and the second person to walk on the Moon. He was the lunar module pilot on Apollo 11, the first manned lunar landing in history. On July 21, 1969, he set foot on the Moon, following mission commander Neil Armstrong. He... Explore this topic

An astronaut is a person (or other animal) that has flown in outer space. Explore this topic

Space is the boundless three-dimensional extent in which objects and events have relative position and direction. Physical space is often conceived in three linear dimensions, although modern physicists usually consider it, with time, to be part of a boundless four-dimensional... Explore this topic

The United States of America, commonly called the United States or America, is a federal republic consisting of fifty states and a federal district. The lower forty-eight contiguous states and the federal district of Washington, D.C. are in central North America between Canada... Explore this topic

The Associated Press is a multinational non-profit news agency based in New York City. The AP is a nonprofit cooperative owned by its contributing newspapers, radio, and television stations in the United States, all of which contribute stories to the AP and use material writte... Explore this topic