The brochure welcomes aliens from the Andromeda galaxy to visit the Milky Way galaxy and its solar system. It provides descriptions of the sun and 9 planets in the solar system, including the terrestrial planets Mercury, Venus, Earth, and Mars, and gas planets Jupiter, Saturn, Uranus, and Neptune. It also describes the asteroid belt and Kuiper belt that orbit the sun beyond the planets. The brochure aims to inform potential visitors about each celestial object and warns about dangers like extreme heat or atmospheres that cannot support life.