Neptune, the eighth and furthest planet from the Sun, is a very cold place. Its bluish color is caused by small amounts of methane gas in its atmosphere. The planet has moons and a very narrow, faint ring system.
Visit another planet: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Dwarf Planets
Ready, Set, SCIENCE!, by the National Research Council, focuses on K-8 science classsrooms. Check out the other publications in our online store, as well as classroom materials.
Real Climate: climate science from climate scientists
Star Stuff: science news from an astronomer's perspective
