Planet Earth

The Moon

  • Moon Facts
  • Moon Features
  • Exploring the Moon
  • The Origin of the Moon

The Sun

  • Sun Facts
  • Sunspots
  • Fusion
  • Observing the Sun
  • Solar Wind

Earth Moon Sun Interactions

  • Phases of the Moon
  • The Moon in Orbit
  • Solar Eclipses
  • Lunar Eclipses
  • How Long is a day?
  • Shadow Sticks and Sundials
  • The Equation of Time
  • Aurorae