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unit 3 lesson 3
historical model of the solar system
Term | Definition |
---|---|
Elliptical | pertaining to or having the form of an ellipse. |
Geocentric | Describes something that uses earth as the reference. |
Gravitational force | a force of attraction between objects that due to their masses. |
Heliocentric | sun-centered. |
Moon | the natural satellite of the earth. |
Orbit | the path that a body follows as it travels around another body in space. |
planet | a relatively large spherical body that orbits a star. |
Solar System | the sun and all of the planets and other bodies that travel around it. |
purallax | a apparent shift in the position of location of an object when viewed form different location |