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Episodes
- S1 E1 - Stonehenge and ArchaeoastronomyJanuary 5, 201731minWhy 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 & MathematicsFree trial of The Great Courses Signature Collection or buy
- S1 E2 - The Real StonehengeJanuary 5, 201730minIn 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.Free trial of The Great Courses Signature Collection or buy
- S1 E3 - Alignments at Maes Howe and NewgrangeJanuary 5, 201729minExplore 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.Free trial of The Great Courses Signature Collection or buy
- S1 E4 - Astronomy of Egypt's Great PyramidJanuary 5, 201729minStudy 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.Free trial of The Great Courses Signature Collection or buy
- S1 E5 - Chaco Canyon and Anasazi AstronomyJanuary 5, 201728minTravel 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.Free trial of The Great Courses Signature Collection or buy
- S1 E6 - Ancient Cosmologies and WorldviewsJanuary 5, 201729minConsider 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.Free trial of The Great Courses Signature Collection or buy
- S1 E7 - Meteorite Worship and Start of the Iron AgeJanuary 5, 201730minWitnessing 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.Free trial of The Great Courses Signature Collection or buy
- S1 E8 - Eclipses, Comets, and OmensJanuary 5, 201729minSince 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.Free trial of The Great Courses Signature Collection or buy
- S1 E9 - The Star of BethlehemJanuary 5, 201729minFor 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.Free trial of The Great Courses Signature Collection or buy
- S1 E10 - Origins of Western ConstellationsJanuary 5, 201732minThe 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.Free trial of The Great Courses Signature Collection or buy
- S1 E11 - Chinese and Other Non-Western ConstellationsJanuary 5, 201730minStudy 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.Free trial of The Great Courses Signature Collection or buy
- S1 E12 - Origins and Influence of AstrologyJanuary 5, 201731minAstrology 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.Free trial of The Great Courses Signature Collection or buy
- S1 E13 - Tracking Planet Positions and ConjunctionsJanuary 5, 201731minUntil 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.Free trial of The Great Courses Signature Collection or buy
- S1 E14 - Ancient Timekeeping and CalendarsJanuary 5, 201731minFor 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.Free trial of The Great Courses Signature Collection or buy
- S1 E15 - The Lunar Crescent and the Islamic CalendarJanuary 5, 201729minDelve 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.Free trial of The Great Courses Signature Collection or buy
- S1 E16 - Ancient Navigation: Polynesian to VikingJanuary 5, 201729minIn 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.Free trial of The Great Courses Signature Collection or buy
- S1 E17 - Breakthroughs of Early Greek AstronomyJanuary 5, 201731minBetween 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.Free trial of The Great Courses Signature Collection or buy
- S1 E18 - The Genius of HipparchusJanuary 5, 201731minConsidered 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?Free trial of The Great Courses Signature Collection or buy
- S1 E19 - Revealing the Antikythera MechanismJanuary 5, 201729minIn 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.Free trial of The Great Courses Signature Collection or buy
- S1 E20 - How the Antikythera Mechanism WorkedJanuary 5, 201728minLearn 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.Free trial of The Great Courses Signature Collection or buy
- S1 E21 - Achievements and Legacy of PtolemyJanuary 5, 201730minPtolemy 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.Free trial of The Great Courses Signature Collection or buy
- S1 E22 - Star Catalogs from around the WorldJanuary 5, 201730minThe 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.Free trial of The Great Courses Signature Collection or buy
- S1 E23 - How Ancient Astronomy EndedJanuary 5, 201730minReview 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.Free trial of The Great Courses Signature Collection or buy
- S1 E24 - Ancient Astronomy and Modern AstrophysicsJanuary 5, 201732minFinish 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.Free trial of The Great Courses Signature Collection or buy
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