The document discusses space exploration and the adventure of space. It lists the planets in our solar system and describes how astronauts usually travel to space in spaceships with 5 crew members and go to the moon or space centers. It highlights that in 1969, Neil Armstrong and Buzz Aldrin became the first humans to walk on the moon. The document also briefly mentions the 1986 Challenger disaster where the spaceship broke apart killing its 7 crew members. It concludes by saying the adventure of space will never end.