Universe and Space

Unit 2

Universe and Space

Learning Objectives

The students are able to

* Explain the beginning of universe

* Know about galaxies and its types

* Recognise different constellations in the night sky Get information about the stars

* Distinguish between natural and artificial satellites.

* Understand the functions of ISRO

Introduction

“My goal is simple. It is a complete understanding of the universe, why it is as it is and why it exists at all.” —Stephen Hawking

Starry night sky is a wonder which has fascinated humans from time immemorial. Our ancestors have observed and documented the objects seen in the night sky. The field of study of the universe is called astronomy. We know that there are billions and billions of stars in the universe, although only about 2000 or so are visible to naked eye. Have you ever think of the size of our universe? The universe is unimaginably and infinitely big. Universe is commonly defined as the totality of everything that exists or is known to exist. Even though the spatial size of the entire universe is still unknown, it is possible to measure the observable universe.

The universe consists of galaxies, planets, stars, meteorites, satellites and all other forms of matter and energy. And it is a world of wonder. Let us move into this world of wonder to know more interesting facts about the place of residence of our solar system.