This book is dedicated to the Faculty  members of my school Delhi Public School Ghaziabad . 

Without the cooperation of my mentors in my school , It was impossible to publish this book of Science and its related facts . 

Hope you as a reader will find some interesting facts of Science and will enjoy it . 

Happy Reading 

The Sun

The Sun is the star at the center of the Solar System . It is a massive , hot ball of plasma , inflated and heated by nuclear fusion reactions at its core. 

The Mercury

Mercury is the smallest and closest planet to the Sun , but also the second densest after Earth , with a huge metallic core that may be partly molten .

The Venus 

Venus is the second planet from the Sun . Venus is the only planet in the Solar System that has a day longer than a year . The year of Venus is 225 Earth days .

The Earth

Earth is the third planet from the Sun in the Solar System . It is the only planet known to have life on it . The Earth formed about 4.5 billion years ago . 

The Mars

Mars is the fourth planet from the Sun in the Solar System and the second - smallest planet . Mars is a terrestrial planet with polar ice caps of frozen water and carbon dioxide . 

The Jupiter

Jupiter is the biggest planet in our solar system . Jupiter is a gas giant . It is made mostly of hydrogen and helium . Jupiter has a very thick atmosphere .