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The distance that the Sun's gravity governs the motions of planets and other bodies; defines our Solar System
The most massive object in the system, a medium sized star that provides energy and gravitational force to govern the orbits of surrounding bodies
The entire mass of air that surrounds Earth made up of 78% nitrogen, 21% oxygen, and trace amounts of other gases
A quantifying measurement used to represent the sensations of "how hot" or "how cold", expressed in degrees Celsius or Fahrenheit
Earth's Magnetic Field
Earth has a polar north and south from which magnetic lines of force are present like a giant magnet
An area that deflects and traps harmful particles; resulting from an interaction of Earth's magnetic field with solar "wind" (charged plasma) streaming from the Sun
Ozone gas in Earth's atmosphere that absorbs most of the damaging high energy ultraviolet radiation from the Sun
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