NATS 1745 Lecture Notes - Lecture 6: Parsec, Right Angle, Tropical Year
22 Feb 2019
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Document Summary
Distances in space: use one of three units, astronomical units (a. u, average earth-sun distance, beyond solar system, light years (ly, distance light travels in 1 year, distance, not time, parsecs. Isaac newton: used mirrors, not lens (ex. 800 ad 1200 ad arabic became the language of science in the. Western world: arabic astronomy influenced by many different sources, including india and. Wednesday, may 23, 2012: two main branches. Islamic: dealt with issues of times and dates for religious purposes, arabic, mathematical tradition based mostly on ptolemy"s almagest that. In islamic tradition, astronomy had three main purposes looked at planetary motion and star catalogue: calendar keeping, ran strictly on the lunar calendar, meaning that the year is actually 11 days shorter than the solar year, ex. Ramadan slowly falls back through the solar calendar: takes approx. Al-battani: one of the first to produce a set of tables, work was influential on later astronomers like copernicus, kepler, and tycho.
