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Space Station Glossary E
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Earth:
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The third planet from the Sun and one of
four global planets in the inner solar system.
Earth, the only planet where water exists
in large amount, has an atmosphere able of
supporting myriad life forms. The planet is
150 million kilometers (93 million miles)
far away from the Sun. Earth has one satellite
— the Moon.
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Electromagnetic Force:
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A basic force that governs all interactions
among electrical charges and magnetism. Basically,
all charged particles attract oppositely affecting
particles and keep away identically charged
particles. Similarly, conflicting poles of
magnets draw and like magnetic poles repel.
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Electromagnetic Spectrum:
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The entire variety of wavelengths of electromagnetic
emission, including radio waves, microwaves,
infrared light, noticeable light, ultraviolet
light, X-rays, and gamma rays.
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Erosion:
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Natural processes that wear or grind away
the outside of an object. On Earth, the major
agents of corrosion are water and wind.
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Escape Velocity:
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The minimum velocity necessary for an object
to escape the magnitude of a massive object.
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