FAMOUS ASTRONOMERS Believed in geocentric universe earth was the center used circular orbits with...
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ASTRONOMY
FAMOUS ASTRONOMERS
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PTOLEMY-85-165AD
Believed in geocentric universe earth was the center
used circular orbits with epicycles
was supported by the church for 1500 years
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Copernicus-1473-1543AD
Believed in heliocentric universe
sun was the center
still used the circular orbits
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Tycho Brahe 1546-1601AD
Supreme mathematician who studied the orbits of the planets had a gold nose
made the best observation of Mars
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Kepler 1571-1630 Studied with
Brahe wrote the Laws
of Planetary Motion
gave the planets an elliptical orbit
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Orbits are oval shaped with the sun off centered
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Kepler’s Laws of Planetary Motion 1. Every planets orbit is an
ellipse.
2. An imaginary line drawn from the center of the sun to the center of the planet will sweep out equal areas in equal intervals of time.
3. The ratio of the squares of the periods of any two planets is equal to the ratio of the cubes of their average distances from the sun. (The Law of Harmonies)
A3/ P² = c
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Galileo 1564-1642
Perfected and used a telescope
1. Discovered Saturn’s
rings
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2. 4 moons of Jupiter
3. Craters on the moon
4. Sunspots on the sun
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How Galileo saw the 4 moons of Jupiter
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Newton 1642-1727
Wrote the Laws of Motion #1 INERTIA a body at rest /motion will remain at rest/motion unless acted upon by an outside
force
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NO SEAT BELT…….
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#2 the amount of force an object has is equal to the mass x the acceleration
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# 3 For every action there is an equal
and opposite reaction
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Einstein-1879-1955 Wrote the Theory of Relativity
gravity holds the universe together
Constant motion
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Space and light are related E=mc2
energy= mass x the speed of light squared
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Caption: Einstein's theory of general relativity may be interpreted in terms of a
curvature of space in the presence of a gravitational field.
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Speed of light=
186,000 mi/ sec or 300,000 Km /sec