In 1969, humanity landed on which celestial body aside from Earth?

The correct choice is Earth's moon. In 1969, the Apollo 11 mission successfully landed astronauts Neil Armstrong and Buzz Aldrin on the lunar surface, making it the first time humans set foot on another celestial body. This monumental event marked a significant achievement in space exploration and has had a lasting impact on science, technology, and society.

Mars, Venus, and Jupiter were not visited by humans until much later, and, in 1969, no human had travelled to any of those planets. Robotic missions have since explored these planets, but the human landing event specifically refers to the moon in that year.