International Earth Rotation Service (IERS)
Provides timely and accurate data on the Earth's orientation by maintaining key connections between astronomy, geodesy, and geophysics (in English and French).
Nine Planets: Earth
Text profile of Earth, the third planet from the Sun.
Find out where the Earth is located in the Milky Way, how our world differs from others, what our world is made of, and where the boundaries of the Earth's atmosphere is. Created by the JST Virtual Science Center.
Offers essays and facts about the planet Earth and its eco-system with scientific experiments.