The Astronomy Book

99 The asteroid Vesta was visited by the Dawn spacecraft from 2011–12. Its orbit lies within that of Ceres, and it is the bright ...

100 A SURVEY OF THE WHOLE SURFACE OF THE HEAVENS THE SOUTHERN HEMISPHERE IN CONTEXT KEY ASTRONOMER John Herschel (1792–1871) BEF ...

101 See also: Messier objects 87 ■ The Milky Way 88–89 ■ Examining nebulae 104–05 URANUS TO NEPTUNE seen by the naked eye, but H ...

102 See also: The Tychonic model 44–47 ■ Measuring the universe 130–37 ■ Beyond the Milky Way 172–77 P arallax is the apparent m ...

103 See also: Observing Uranus 84–85 ■ The properties of sunspots 129 ■ Carrington (Directory) 336 S unspots are cooler areas on ...

104 A SPIRAL FORM OF ARRANGEMENT WAS DETECTED EXAMINING NEBULAE IN CONTEXT KEY ASTRONOMER Lord Rosse (1800 –1867) BEFORE 1784 Ch ...

105 See also: Messier objects 87 ■ The Milky Way 88–89 ■ The southern hemisphere 100–01 ■ Properties of nebulae 114–15 ■ Spiral ...

106 THE PLANET WHOSE POSITION YOU HAVE POINTED OUT ACTUALLY EXISTS THE DISCOVERY OF NEPTUNE IN CONTEXT KEY ASTRONOMER Urbain Le ...

107 See also: The Milky Way 88–89 ■ Gravitational disturbances 92–93 ■ The theory of relativity 146–53 URANUS TO NEPTUNE look fo ...

THE RIS E OF ASTROP HYSICS 1850 –1915 ...

THE RIS E OF ASTROP HYSICS 1850 –1915 ...

110 I n the early 19th century, astronomy was mainly concerned with cataloging the positions of stars and planets, and understan ...

111 By the end of the 19th century, it seemed that, in order to fully understand the nature of stars, it was necessary to system ...

112 See also: Analyzing starlight 113 ■ The characteristics of stars 122–27 ■ Refining star classification 138–39 ■ Stellar comp ...

113 See also: The sun’s spectrum 112 ■ The sun’s emissions 116 ■ The star catalog 120–21 ■ The characteristics of stars 122–27 A ...

114 ENORMOUS MASSES OF LUMINOUS GAS PROPERTIES OF NEBULAE IN CONTEXT KEY ASTRONOMER William Huggins (1824 –1910) BEFORE 1786 Wil ...

115 See also: Observing Uranus 84–85 ■ Messier objects 87 ■ The sun’s spectrum 112 THE RISE OF ASTROPHYSICS nebulae are indeed c ...

116 See also: The sun’s spectrum 112 ■ Nuclear fusion within stars 166–67 ■ The primeval atom 196–97 I n August 1868, the French ...

117 See also: Observing Saturn’s rings 65 ■ Analyzing starlight 113 ■ Life on other planets 228–35 B y the mid-19th century, sci ...

118 PHOTOGRAPHING THE STARS ASTROPHOTOGRAPHY IN CONTEXT KEY ASTRONOMER David Gill (1843–1914) BEFORE 1840 The first clear photog ...