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Unit 3 Lesson 1
Historical model of solar system
Term | Definition |
---|---|
Elliptical | using or involving ellipsis, especially so as to be difficult to understand. |
Geocentric | earth centered |
Gravitational force | he force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface; "the more remote the body the less the gravity"; "the gravitation between two bodies is proportional to the product of th |
Heliocentric | sun centered |
Moon | the natural satellite of the earth, visible (chiefly at night) by reflected light from the sun. |
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 |
Parallax | An apparent shift in the position of an object when viewed from different locations. |