The Solar System

CHAPTER 3 | CYCLES OF THE MOON 45 day longer than 18 years 11 days. When the eclipse happens again, Earth will have rotated one- ...

46 PART 1^ |^ EXPLORING THE SKY Although there are historical reasons to doubt that Th ales actually predicted the eclipse, the ...

What Are We? Scorekeepers The moon is a companion in our daily lives, in our history, and in our mythology. It makes a dramatic ...

48 PART 1^ |^ EXPLORING THE SKY If on March 1 the full moon is near the Favorite Star Spica, when will the moon next be full? W ...

49 Galileo’s telescope revealed such things as craters on the moon, and he explained how that evidence could be used to test the ...

50 PART 1^ |^ EXPLORING THE SKY How you would burst out laughing, my dear Kepler, if you would hear what the greatest philosophe ...

CHAPTER 4 | THE ORIGIN OF MODERN ASTRONOMY 51 N Ditch Bank Stone Aubrey Hole E Highway A344 (modern) Most northerly moonset Most ...

52 PART 1^ |^ EXPLORING THE SKY universe are in many cases lost. Many cultures had no written language. In other cases, the writ ...

CHAPTER 4 | THE ORIGIN OF MODERN ASTRONOMY 53 astronomical thought from the classical Greek era through the Renaissance, you sho ...

54 PART 1^ |^ EXPLORING THE SKY Aristotle and the Nature of Earth Aristotle (384–322 bc), another of Plato’s students, made his ...

CHAPTER 4 | THE ORIGIN OF MODERN ASTRONOMY 55 at Alexandria in what is now Egypt. He ensured the continued acceptance of Aristot ...

PART 1 | EXPLORING THE SKY Seen by left eye Seen by right eye From Cosmographica by Peter Apian (1539). Ecliptic East West Plane ...

Sphere of fixed stars Saturn Jupiter Mars Sun Venus Mercury Moon Earth Epicycle Earth Equant Deferent Planet Retrograde motion o ...

58 PART 1^ |^ EXPLORING THE SKY linked with Christian teachings. According to the Aristotelian universe, the most perfect region ...

CHAPTER 4 | THE ORIGIN OF MODERN ASTRONOMY 59 motion. In fact, Copernicus objected strongly to Ptolemy’s use of the equant. It s ...

60 PART 1^ |^ EXPLORING THE SKY astronomers of the time knew of other stars and galaxies. Th e planets circle the sun, not Earth ...

CHAPTER 4 | THE ORIGIN OF MODERN ASTRONOMY 61 SCIENTIFIC ARGUMENT Why would you say the Copernican hypothesis was correct but th ...

62 PART 1^ |^ EXPLORING THE SKY ■ Figure 4-11 Tycho Brahe (1546–1601) was, during his lifetime, the most famous astronomer in th ...

CHAPTER 4 | THE ORIGIN OF MODERN ASTRONOMY 63 a luxurious home with six towers especially equipped for astron- omy and populated ...

64 PART 1^ |^ EXPLORING THE SKY Danish astronomer. Tycho’s sudden death in 1601 left Kepler, the new imperial mathematician, in ...