The Remarkable Science of Ancient Astronomy
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The Remarkable Science of Ancient Astronomy

Temporada 1
Taught by Professor Bradley Schaefer of Louisiana State University, this course shows how ancient Egyptians, Greeks, Indians, Chinese, and other cultures saw the sky. You learn how the Sun, Moon, and stars were their clock, calendar, and compass; constellations encoded their mythologies; and the heavens inspired religious and philosophical ideas, laying the foundation for modern science.
201724 episódiosTV-PG
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Episódios

  1. T1 E1 - Stonehenge and Archaeoastronomy

    5 de janeiro de 2017
    31 min
    TV-PG
    Why were the motions of the Sun, Moon, and stars so important to ancient people? Investigate key astronomical directions noticed by all cultures. Then embark on your study of Stonehenge, seeing how it gave birth to the field of archaeoastronomy and to some very curious modern theories.#Science & Mathematics
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  2. T1 E2 - The Real Stonehenge

    5 de janeiro de 2017
    30 min
    TV-PG
    In the popular mind, Stonehenge was built as a sophisticated astronomical calculator presided over by priestly astronomers called Druids. But is this view dating from the mid-1960s correct? Address the evidence, and survey the archaeological record to discover the most probable function of Stonehenge.
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  3. T1 E3 - Alignments at Maes Howe and Newgrange

    5 de janeiro de 2017
    29 min
    TV-PG
    Explore Neolithic tombs and monuments across Europe, discovering an array of alignments toward astronomical events. Start with two sites that are similar to Stonehenge in their clear orientation to the winter solstice: Maes Howe in the Orkney Islands, and Newgrange in Ireland.
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  4. T1 E4 - Astronomy of Egypt's Great Pyramid

    5 de janeiro de 2017
    29 min
    TV-PG
    Study the astronomical significance of Egypt's Great Pyramid. How did its builders achieve such phenomenal accuracy in the pyramid's alignment to the cardinal directions? Were its air shafts intended to point at stars of special importance? Also evaluate modern claims for the mystical power of pyramids.
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  5. T1 E5 - Chaco Canyon and Anasazi Astronomy

    5 de janeiro de 2017
    28 min
    TV-PG
    Travel to Chaco Canyon, New Mexico, where the Anasazi culture practiced sky-centered rituals a thousand years ago. Look for evidence of their astronomical knowledge, examine their many "sun daggers," and probe the controversial pictograph thought to depict the Crab Nebula supernova explosion in 1054 AD.
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  6. T1 E6 - Ancient Cosmologies and Worldviews

    5 de janeiro de 2017
    29 min
    TV-PG
    Consider the astronomy-based world views of different ancient cultures and how they answered the three big questions: Where did the world come from? What is the nature of the universe? What is its fate? Survey the beliefs of the Greeks, Chinese, Australian aborigines, and other groups, seeking common elements.
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  7. T1 E7 - Meteorite Worship and Start of the Iron Age

    5 de janeiro de 2017
    30 min
    TV-PG
    Witnessing a meteor fall must have been a strange and awe-inspiring experience for people long ago. Travel around the world to places where meteorites were worshiped and also used as a source of iron, which was rarer than gold before the smelting technology of the Iron Age.
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  8. T1 E8 - Eclipses, Comets, and Omens

    5 de janeiro de 2017
    29 min
    TV-PG
    Since no human can touch the sky, any unexpected celestial event must be a divine omen. Reenter this primordial state of mind, seeing eclipses and comets the way they were perceived before the advent of modern science. In the course of this investigation, discover why comets became more feared than eclipses.
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  9. T1 E9 - The Star of Bethlehem

    5 de janeiro de 2017
    29 min
    TV-PG
    For centuries, astronomers have struggled to find an explanation for the Star of Bethlehem, recounted in the Gospel of Matthew. Professor Schaefer focuses on a recent theory that has taken scientists and biblical scholars by surprise, due to its success at solving problems that plagued all previous proposals.
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  10. T1 E10 - Origins of Western Constellations

    5 de janeiro de 2017
    32 min
    TV-PG
    The human propensity for pattern recognition and storytelling has led every culture to invent constellations. Trace the birth of the star groups known in the West, many of which originated in ancient Mesopotamia. At least one constellation is almost certainly more than 14,000 years old and may be humanity's oldest surviving creative work.
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  11. T1 E11 - Chinese and Other Non-Western Constellations

    5 de janeiro de 2017
    30 min
    TV-PG
    Study the constellation patterns of ancient China, which influenced those of India and Arabia. Professor Schaefer dates the origin of the Chinese star groups called lunar lodges, and he samples southern constellations conceived by cultures in South America, and Australia.
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  12. T1 E12 - Origins and Influence of Astrology

    5 de janeiro de 2017
    31 min
    TV-PG
    Astrology grew up hand in hand with astronomy. Focus on the different astrological traditions in Mesopotamia, China, India, and Mexico. Also trace the spread of astrology through the Mediterranean world. As an example, study the auspicious horoscope of Octavian, who became Emperor Augustus.
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  13. T1 E13 - Tracking Planet Positions and Conjunctions

    5 de janeiro de 2017
    31 min
    TV-PG
    Until the invention of the telescope in 1610, astronomy was mostly the study of the sky positions of the Sun, Moon, and planets. Learn the extraordinary precision attained by ancient astronomers in their observations. Discover why they prized this knowledge, and also uncover a lost great discovery of the Babylonians.
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  14. T1 E14 - Ancient Timekeeping and Calendars

    5 de janeiro de 2017
    31 min
    TV-PG
    For ancient people, keeping track of the time of day and year required a detailed understanding of the motions of the Sun, Moon, and stars. See how different cultures solved this problem. Also learn how to use a handy astronomical measuring device called the astrolabe.
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  15. T1 E15 - The Lunar Crescent and the Islamic Calendar

    5 de janeiro de 2017
    29 min
    TV-PG
    Delve into the surprisingly tricky problem of deciding when a lunar month begins - usually determined by the first sighting of a crescent Moon after new Moon. Professor Schaefer describes his algorithm for calculating this event and then applies it to dating the crucifixion of Jesus.
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  16. T1 E16 - Ancient Navigation: Polynesian to Viking

    5 de janeiro de 2017
    29 min
    TV-PG
    In the era before compasses and GPS, precise direction-finding was possible only through knowledge of the sky. Learn how the Polynesians found islands across thousands of miles of open ocean, and how the Vikings solved the very different challenge of navigating the North Atlantic.
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  17. T1 E17 - Breakthroughs of Early Greek Astronomy

    5 de janeiro de 2017
    31 min
    TV-PG
    Between 600 and 200 BC, Greek astronomers went from being flat-Earthers to full proto-scientists with reasonable models and distances for the Solar System. How and why did this revolution happen? Focus on the achievements of Thales, Aristarchus, Eratosthenes, and Aristotle.
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  18. T1 E18 - The Genius of Hipparchus

    5 de janeiro de 2017
    31 min
    TV-PG
    Considered the greatest astronomer of the ancient world, Hipparchus created a thousand-star catalog and discovered precession, the eons-slow rotation of the fixed stars around the ecliptic. Did this remarkable discovery give birth to the Mithraic religion, which rivalled Christianity?
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  19. T1 E19 - Revealing the Antikythera Mechanism

    5 de janeiro de 2017
    29 min
    TV-PG
    In 1901, divers off a Greek island discovered a corroded bronze artifact composed of interlocking gears. Later analysis and X-ray imaging show it is an astonishingly versatile astronomical computer. Professor Schaefer identifies a probable date when it was built and two likely candidates for its brilliant designer.
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  20. T1 E20 - How the Antikythera Mechanism Worked

    5 de janeiro de 2017
    28 min
    TV-PG
    Learn to operate the Antikythera mechanism, the glory of ancient astronomy. Modern models show how a simple turn of the crank could reveal the day of the year, phase of the Moon, possible eclipse dates, the cycles of ancient games, and other information. Probe the historical impact of this device.
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  21. T1 E21 - Achievements and Legacy of Ptolemy

    5 de janeiro de 2017
    30 min
    TV-PG
    Ptolemy has been called the greatest astronomer of antiquity. But was he? Evaluate his reputation by focusing on his star catalog, celestial coordinate system, and magnitude scale. Then gauge the extent of his influence over later astronomers, which lasted over a thousand years.
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  22. T1 E22 - Star Catalogs from around the World

    5 de janeiro de 2017
    30 min
    TV-PG
    The genius of Greek astronomy is epitomized by the star catalogs of Hipparchus and Ptolemy. Professor Schaefer recounts his exciting discovery of a star chart apparently influenced by Hipparchus's lost catalog. Close by comparing Greek star catalogs with those of China and the Arab world.
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  23. T1 E23 - How Ancient Astronomy Ended

    5 de janeiro de 2017
    30 min
    TV-PG
    Review the state of astronomy in 1500. Then chart the revolution sparked by Copernicus's heliocentric theory of the Sun and planets. Learn how Copernicus was the last of the ancient astronomers, succeeded by the founders of modern science, including Tycho, Kepler, and Galileo.
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  24. T1 E24 - Ancient Astronomy and Modern Astrophysics

    5 de janeiro de 2017
    32 min
    TV-PG
    Finish the course by seeing how ancient records of eclipses and supernova explosions have refined our modern understanding of Earth-Moon dynamics and stellar processes - proving that today's cutting-edge astrophysicists owe a great debt to astronomers who watched the skies long ago.
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