This document contains information about various topics related to space and the universe. It describes Laika the dog who was the first animal in space, defines an astronaut as someone who travels to space, and notes that the sun is a star over 5 billion years old. It also mentions galaxies, the moons of Jupiter, Galileo Galilei the astronomer, Yuri Gagarin the first person in space, the possibility of aliens, the moon, Neil Armstrong the first person on the moon, the Hubble space telescope, black holes, Ham the monkey launched into space, the universe, Mars, stars, planets, Earth, space stations, Uranus, the solar system, and Buzz Aldrin the second person to walk on