The Solar System

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Describes the Sun, planets, and other objects in the solar system.

Is There Life on Other Planets?

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There is no gravity in space. The North Star never changes its position in the sky. Earth’s shadow causes the phases of the moon. You may have heard these com

The Biosphere

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Describes the attributes of the biosphere, the animal and plant life that live in the biosphere, and how fragile and dynamic it is.

Sun

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Discusses the orbit, atmosphere, surface features, exploration, and other aspects of the planet Sun.

The Astronaut's Cookbook

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Astronauts, cosmonauts, and a very limited number of people have experienced eating space food due to the unique processing and packaging required for space tra