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What did Ptolemy Think?
The earth was the center of the solar system, and all objects revolved around the earth
the former assistant of Tyco Brahe, who disagreed with Brahe, devised the laws of planetary motion and created the most accurate solar system to date
The first astronomer to use a telescope and to observe the moons of jupiter, and observe the phases of venus
The Solar System consists of the following classes of bodies:
1) The Sun
2) The Planets
3) The Stars
what are meteors
masses of rock and metal wandering through space until attracted to the earth by gravity
Why are meteors visible only for an instant
because the friction in the air causes them to either explode or burn up.
The diameter through the poles is _______ than the diameter through the equator by about 27 miles
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