DK - WOW! The Visual Encyclopedia of Everything

139 (^2) SATURN Sixth from the Sun, and second largest, is pale yellow Saturn. Its distinctive feature is its ring system, which ...

140 Callisto’s icy surface is covered by impact craters Oceanus Procellarum (Ocean of Storms) is a vast lava-covered plain Titan ...

141 1 THE MOON The Moon is Earth’s only natural satellite. It is about a quarter the size of Earth and the fifth largest of all ...

More than a trillion comets surround the planetary region of the Solar System. They follow long orbits around the Sun and togeth ...

143 Tail shapes blue and straight, and the The gas tail is dust tail is white and curved. The nucleus of Halley’s Comet is 15.3 ...

Thousands of tonnes of rocky material enter Earth’s atmosphere each year. Most of it originates from asteroids, but some comes f ...

145 ▲ NAKHLA This stony meteorite is one of more than 30 found on Earth that originated on Mars. It was blasted off the planet a ...

A telescope is the astronomer’s basic tool. It makes distant objects appear bigger and reveals their detail. Telescopes work by ...

147 ◀ MEDIUM-SIZED TELESCOPE VIEW The nebula’s shape and form become visible through a telescope with a mirror about 20 cm (7.8 ...

148 Humans have only been able to send spacecraft to explore space for about 50 years. In that time, more than 100 robotic craft ...

149 Pioneer craft investigate Jupiter First international space rendezvous Apollo 15 mission Hubble Space Telescope launched Col ...

Since the first manned space mission in 1961, more than 560 people have journeyed into space – 27 on missions to the Moon and th ...

151 (^22) Bruce McCandless made the first untethered spacewalk in February 1984. (^23) John Glenn was the first American to orbi ...

ANTARCTICA The Transantarctic Mountains extend across Antarctica, dividing the continent into east and west. This region borderi ...

Earth 153 152_153_Earth.indd 153 03/01/19 12:10 PM ...

Earth was created some 4.5 billion years ago from a mass of iron-rich, rocky debris orbiting the Sun. The rocks smashed into the ...

155 THE MOON Soon after Earth formed, it was hit by a planet-sized asteroid that completely disintegrated. Most of its heavy met ...

156 Earth’s crust is the brittle shell of a deep layer of hot rock called the mantle. This is moving very slowly, driven by heat ...

157 FRACTURED GLOBE ▶ The plates fit together to form the globe. Some plates are moving apart at divergent boundaries, but the w ...

158 Eruptions produce clouds of gas, made mainly of water vapour, carbon dioxide, and sulfur dioxide Lava, cinders, and volcanic ...