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Unit 3 lesson 1
Historical Model of solar system
Question | Answer |
---|---|
A. Elliptical | shaped like a flattened circle |
B. Geocentric | Describe something that uses Earth as the reference point |
C. Gravitational Force | the force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface |
D.Heliocentric | Sun-centered |
E.Moon | the natural satellite of the earth, visible (chiefly at night) by reflected light from the sun. |
F.Orbit | The Path that a body follows as it travels around another body in space |
G.Planet | A relatively large spherical body that orbits a star. |
H.Solar System | The sun and all of the planets and other bodies that travel around it |
I.Parallax | the angular amount of parallax in a particular case, especially that of a star viewed from different points in the earth's orbit. |