Neil Armstrong was the first person to walk on the moon.

Explanation:

1. Neil Armstrong:
Neil Armstrong was an American astronaut who made history on July 20, 1969, by becoming the first person to set foot on the moon. He was the commander of the Apollo 11 mission, which was the first manned mission to land on the moon.

2. Apollo 11 Mission:
The Apollo 11 mission was launched by NASA, the United States' space agency, with the goal of landing humans on the moon and returning them safely to Earth. Neil Armstrong, along with Buzz Aldrin and Michael Collins, was part of the crew.

3. Lunar Module:
The lunar module, named Eagle, was the spacecraft that landed on the moon's surface. On July 20, 1969, Neil Armstrong and Buzz Aldrin descended from the lunar module to the moon's surface while Michael Collins remained in orbit around the moon in the command module.

4. First Steps on the Moon:
At 10:56 p.m. EDT, Neil Armstrong opened the hatch of the lunar module and descended down the ladder to the moon's surface. As he took his first step, he famously said, "That's one small step for man, one giant leap for mankind." His first step on the moon marked a significant achievement for humanity and the culmination of years of scientific and technological advancements.

5. Moonwalk and Mission Success:
During their moonwalk, Neil Armstrong and Buzz Aldrin conducted experiments, collected samples, and planted the American flag on the moon's surface. They spent a total of about two and a half hours outside the lunar module before returning inside. The mission was deemed a success, and the crew returned to Earth on July 24, 1969, safely landing in the Pacific Ocean.

In conclusion, Neil Armstrong was the first person to walk on the moon. His historic achievement during the Apollo 11 mission paved the way for further exploration of space and expanded our understanding of the universe.