brief note on Our earth in the universe.
Answers
Heya Mate!
For understanding just read the answer given below .
We have learnt about galaxies and stars as well as the solar system and it's different components. Stars are born out of nebulae. Nebulae are clouds made up mainly of hydrogen gas and dust particles. The particles in these clouds are attracted towards one another due to the force of gravity. As the result the clouds contract and become dense and spherical in shape . At the same time , the pressure of the gas at the core of the cloud increases causing the temperature to rise tremendously and energy generation process start there . Such a spherical cloud of hydrogen is called a star.
Later processes such as contraction, expansion, rise in temperature, etc . brings about changes in the nature of the star. These changes occur over a very long period of time and constitute the lifecycl of stars . The different forms of stars at various stages during this lifecycle are identified as different types of stars.
The universe is a huge space which contains of planets, stars, satellites, asteroids, comets and meteorites. The system containing the sun and its family members including the earth is called solar system.