KEY TERMS

• • Uranus

    Uranus is the seventh planet outward from the sun and is especially notable for its unique tilt, which has left the planet rotating on its side. Nearly a twin in size to Neptune, Uranus has more methane in its mainly hydrogen and helium atmosphere than Jupiter or Saturn. Methane gives Uranus its bluish tint – not because methane is blue, but because it scatters red light out of sunlight leaving mostly bluish light to be reflected by the planet.