The document provides an overview of the sun, moon, and earth, detailing their distances from each other, temperatures, and whether they can support life. The sun, located 93 million miles away, is too hot and lacks necessary elements for life, while the earth, known as the 'blue planet,' supports life due to its water and oxygen content. The moon, 250,000 miles from earth, also cannot support life but affects earth's tides and can be visited by astronauts.