On July 20, 1969, American astronauts Neil Armstrong and Buzz Aldrin became the first humans to walk on the Moon. (The third member of the Apollo 11 crew, Michael Collins, piloted the orbiting spacecraft.) Armstrong stepped off the lunar landing module Eagle and,uttered the famous phrase “That’s one small step for man, one giant leap for mankind.”

From more than 386,242 kilometers (240,000 miles) away, millions of people tuned into the radio and watched a live television broadcast. Armstrong and Aldrin spent 21 hours and 36 minutes exploring the Moon before safely returning to the command vehicle and Earth.

NASA sent several additional Apollo missions to the Moon. Each mission studied different features of the Moon such as the Fra Mauro crater and the Taurus-Littrow highlands. These missions were interested in the physical and geographical aspects of the Moon, including soil properties, magnetic fields, and solar wind characteristics.

aspect
Noun

view or interpretation.

astronaut
Noun

person who takes part in space flights.

Noun

bowl-shaped depression formed by a volcanic eruption or impact of a meteorite.

highlands
Plural Noun

plateau or elevated region of land.

lunar
Adjective

having to do with Earth's moon or the moons of other planets.

magnetic field
Noun

area around and affected by a magnet or charged particle.

Moon
Noun

Earth's only natural satellite.

Verb

to move in a circular pattern around a more massive object.

pilot
Noun

person who steers a ship or aircraft.

soil
Noun

top layer of the Earth's surface where plants can grow.

solar wind
Noun

flow of charged particles, mainly protons and electrons, from the sun to the edge of the solar system.

spacecraft
Noun

vehicle designed for travel outside Earth's atmosphere.

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