The New Childrens Encyclopedia

Contents INTRODUCTION SPACE The universe Galaxies Balls of gas The solar system Flying rocks Eye spy space The Apollo program Ex ...

Plant reproduction Animal life Mammals Mammal record breakers Killer carnivores Amphibians Reptiles Birds Penguins and birds of ...

Introduction E very child needs a book that answers his or her questions about the world: how it was made, what makes plants gro ...

u COLLECTIONS look at a particular group of things such as beetles and bugs ( p. 116–117), flags, and mammals. u DETAILED MAPS a ...

SPACE Which star is our nearest star? Find out on pages 12- Which planet is the king of the planets? Find out on pages 16- The u ...

Definition: Space includes the entire universe—planets, moons, stars, and galaxies. Since its birth in the Big Bang, space has b ...

2 Postinflation, the universe is a seething, hot soup of electrons, quarks, and other particles. The universe The universe is un ...

9 6 Gravity makes hydrogen and helium gas come together to form clouds where the first stars are born. Larger clouds and groups ...

O

Spiral Galaxy Spinning spiral galaxies have long, curved arms. Young stars, pink nebulas, and dust are found in the arms. O

...

The Antennae nuclei (yellow) are colliding to form one giant galaxy GALAXIES 11 ANTENNAE GALAXIES A well- known collision involv ...

12 Balls of gas A star is a huge, glowing ball of hydrogen gas that shines because of nuclear reactions in its core. The hottest ...

13 O

Diameter 863,746 miles (1,390,000 km) O

Mass (Earth=1) 330, O

Core temperature 27,000,032°F (15,000,000°C) O

Distance f ...

The solar system is our local area of space. As its center is the Sun, our nearest star, which accounts for almost all (99.9 per ...

THE SOLAR SYSTEM 15 ORBITING THE SUN The solar system includes eight planets, five dwarf planets, more than 150 moons, and milli ...

Jupiter King of the Roman gods O

Earth years to orbit Sun 12 O

Discovery date Unknown (but known since ancient times) O

Numbe ...

THE SOLAR SYSTEM O
The planets of our solar system orbit the Sun in nearly perfect circles. O
Our nearest neighbor, Venus, is ...

Flying rocks There are billions of rocks in the Milky Way that never became big enough to be planets. They orbit the Sun and som ...

TAKE A LOOK: METEORS Look up at the sky on a cloudless night and you will eventually see a meteor, or “shooting star.” Meteors a ...

Eye spy space People have been staring at the heavens since prehistoric times. They measured the positions of the stars and watc ...

EYE SPY SPACE ■ Overall height 81 ft (24.6 m) ■ Total moving weight 300 tons (270 metric tons) ■ Total weight of glass 16 tons ( ...