The babylonians divided the stars into groups

This preview shows 14 out of 18 pages.

The Babylonians divided the stars into groups (constellations ) and passed on their
Image of page 14

Subscribe to view the full document.

descriptions to the Ancient Greeks, from whom today’s constellation names originated. (diagram: CH 2-26) The constellation around the ecliptic held a special/significances, as the planets move along this strip of sky. The Ancient Greeks named these the zodac constellations (Greek “ circle of animals ” ) Babylonian Astronomy 2000-331 BC Oct 28 - Babs tracked the cycles of the sky, which they believed foretold the future - This was the origin of western astrology - Each night, a record of the sky was entered on a tablet. The daily records, combined with a book of interpretations, were used to predict the celestial events (&their omens) for the next year - The brabs divide the stars into groups (constellations) and passed on their descriptions to the Ancient Greeks, from whom today’s constellation names originated - The constellations believe the ecliptic held a special significance, as the planets move along this strip of sky. The Greeks name these the Zodiac (Greek for circle of animals) constellations The Bab Numeric system - The babs used a base -#60 system (i.e. consisting of symbols for 1-60 multiplied by a power of 60), as 60 has many factors (a convenient base for division) - They so used units that are multiplies of 60: e.g. 60 mins =1 hr, 60s =1 min, 360 degree = 1 circle The “star” of Bethlehem Possibilities - The animal appearance of a bright stars at the zenith of Bethlehem (X) - A comet, nova or a supernova (X) - A supernatural celestial event that can’t be explained by modern science (maybe) - A myth invented by disciples to …Jesus (maybe) - The planetary conjunction of 6 BC Chapter 3 Astronomy in Ancient Greece 776-146 BC The fragmented geography and decentralized rule of the Ancient Greece allowed for an intellectual freedom that led to a … in scientific thought
Image of page 15
Thales (~624-546 BC) the world’s first come up with scientific for natural - Considered the “fathers of science” for attempting to find explanations for natural phenomena that didn’t evolve the Greek Gods - His philosophy gained support when he demonstrated that some acts of nature ( e.g. eclipses ) are predictable . Pythagoras ~570-495 BC Caught: - The universe in a “cosmos” (a harmonious, knowable system that obeys laws) - All celestial motion in perfectly circulas - Earth in round #1 Evidence that Earth is round - Ships gradually disappear on the horizon bottom first - Earth’s shadow on the eclipsed moon is always round - Constellations rise and set rapidly as you travel north or south Nov 02, 2010 Planetary Motion( 行行行行 ) Sidereal Period : time for a planet to complete 1 orbit w/respect to the stars ( a.k.a. orbital period) Synodic period: time for a planet to return to the same position relative to the sun, as seen from Earth.
Image of page 16

Subscribe to view the full document.

Apparent motion: the motion of a celestial body across the sky Angular speed: the angle of sky traversed by a celestial body per unit time Features of apparent planetary motion: 1.
Image of page 17
Image of page 18
You've reached the end of this preview.
  • Fall '11
  • RobinMetcalfe

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern