Fourmilab Switzerland
John Walker: Earth and Moon Viewer and Solar System Explorer
This website provides numerous images of the Earth and moon, shown from various vantage points.
Other
Spacetech's Orrery: Earth Our Home Planet
This site provides a very interesting overview of our home planet, Earth. Content includes a focus on the atmosphere, the pull of gravity, and the active surface.
NASA
Nasa: Astronomy Picture of the Day:
A different image is featured each day along with descriptive narrative. NASA offers different and sometimes unexpected views of our Earth and the universe.
BBC
Bb Ci Space: Earth
The BBC provides a general overview of the planet Earth. Content includes statistical information, a focus on the four seasons, moon information, and more.
NASA
Nasa Star Child: The Planet Earth
Facts about the Earth including its orbit, its atmosphere, and its landforms. Includes a discussion question on seasons, with facts about them, and the answer. A linked page covers similar material in a "Level 2" version, and has a...