Dungeons & Dragons Online Movie

Jimmy pipkin
9/7/05

Eratoshenes found the circumference of eartth to be 25000 miles., roughly the present value. When he calculated this, however, he assumed that the sun was so far awayfrom the earth that the rays it emits are parallel.

Ptolemy envisioned epicycles, but it was forgotten by careless people over the years. He later developed a model to demonstrate the retrograde motion of planets. However, ptolemy’s model was incorrect.

The arabs invented algebra, but we’ll see what bill o’reilly and the catholic church have to say about that. The church didn’t agree with Copernicus, who was able to explain that retrograde motion was caused by perspective issues from vantage points on passing planets revolving around a central star. It’s just a matter of perspective from each planet. They only appear to be moving erratically, but are not really doing so. Copernicus’s model assumed that every planet’s orbit around the sun was totally circular, so he was somewhat wrong.

Copernicus also used the Pythagorean theorem to find the distance to the planets from earth or from the sun. His calculations were very accurate.

Tchyo brahe used his bling to build complex and precise instruments in 1500s Europe. He was the last famous astronomer to believe that the earth was the center of the universe.

Kepler calculated that mars’ orbit around the sun is an elliptical one. He also compiled, after making discoveries of the nature of planetary motion, his three laws:
1. planets movie in elliptical orbits
2. orbital speed of planets varies…
3. period (in years) = semimajor axis ^ 3 (In AU’s)

kepler was the granddaddy of planetary motion.

Galileo was more interested in the motion of all objects (including planets) than Kepler. He was first to publish information on the moons of Jupiter. He discovered that the universe was much bigger than previously thought by observing the sheer amount of stars in the milky way. In 1992 the church admitted wrongdoing to Galileo by punishing his views in forcing him into house arrest for the remainder of his life, after being accused of Heresy.

geez, go with text or get some decent voice acting :\

Is it me or did someone steal all the polys?