Could we live on the Moon?
The Moon has no atmosphere to protect it from the Sun's rays. It is baked during the day and frozen at night, as the day's warmth escapes into space. To survive on the Moon, humans need spacesuits for insulation and air. Food and water have to be brought from Earth. It is possible that water in form of ice is already present at the Moon's poles. If it could be melted, algae and bacteria brought from Earth could then be grown as food.

Other moons
All the planets in the Solar System, except Mercury and Venus, have at least one moon, and Saturn has 18 or more. The smallest of Saturn's moons, Pan, is only 20 km (12 miles) in diameter, and the biggest, Titan, is 5150 km (3200 miles), which makes it larger than the planet Mercury. It also has an atmosphere with a pressure ten times greater than the Earth's. This atmosphere protects Titan from bombardment by meteorites. The Cassini spacecraft, launched in 1997, will reach Saturn in 2004 and send a probe to sample Titan's surface.