The Astronomy Book

39 Though Copernicus’s work was widely circulated, it took a century or more before its basic ideas were accepted by most other ...

THE TEL ESCOPE REVOLU TION 1550–1750 ...

THE TEL ESCOPE REVOLU TION 1550–1750 ...

42 T he Dane Tycho Brahe was the last great astronomer of the pre-telescope era. Realizing the importance of trying to record mo ...

43 that the planets were carried on invisible spheres, but Tycho had demonstrated that comets travel unhindered through interpla ...

44 I NOTICED A NEW AND UNUSUAL STAR HE TYCHONIC MODELT I n the 16th century, the exact orbits of the planets were a mystery. Dan ...

45 See also: The geocentric model 20 ■ Consolidating knowledge 24–25 ■ The Copernican model 32–39 ■ Elliptical orbits 50–55 ■ He ...

46 Further evidence of a changing cosmos came from Tycho’s observation of the Great Comet in 1577. Aristotle had claimed that co ...

47 Copernicus was wrong and that Earth did not move. This was Tycho’s conclusion. The Tychonic model In reaching this conclusion ...

48 MIRA CETI IS A VARIABLE STAR A NEW KIND OF STAR IN CONTEXT KEY ASTRONOMER David Fabricius (1564 –1617) BEFORE 350 bce Greek p ...

49 An artist’s impression shows material flowing from Mira A (right) onto the hot disk around its companion white dwarf Mira B ( ...

THE MOST TRUE PATH OF THE PLANET IS AN ELLIPSE ELLIPTICAL ORBITS ...

THE MOST TRUE PATH OF THE PLANET IS AN ELLIPSE ELLIPTICAL ORBITS ...

52 ELLIPTICAL ORBITS Kepler’s most productive years came in Prague under the patronage of Holy Roman Emperor Rudolf II (r.1576–1 ...

53 through space that would fit the observational data. This is where the mathematical abilities of Kepler, Brahe’s assistant, c ...

54 set. Kepler was lucky to have chosen Mars, since its orbit has a high eccentricity, or stretch: 0.093 (where 0 is a circle an ...

55 Kepler’s great breakthrough was his calculation of the actual form of the planetary orbits, but the physics behind his three ...

OUR OWN EYES SHOW US FOUR STARS TRAVELING AROUND JUPITER GALILEO’S TELESCOPE ...

OUR OWN EYES SHOW US FOUR STARS TRAVELING AROUND JUPITER GALILEO’S TELESCOPE ...

58 G alileo Galilei’s effective use of a telescope marked a watershed in the history of astronomy. There have been other turning ...