Question

Write about the phases of evolution of facts, about the astronomical bodies their birth and growth.

Answer 1

• Initially, people were of the view that the earth was firm and stationary and all the other bodies went round it. 
• About five hundred years ago scientists concluded that the earth is not in the middle of everything. 
• The earth actually moves round the sun and that the sun itself is also moving.
• The countless stars in the sky are actually so many suns.
• During the last hundred years or so people learnt the stars are born, they grow old and even die.
• Scientists even came to know that the stars are actually part of larger groups called galaxies. 
• There are millions of galaxies in the universe.
• Now scientists are of the view that the universe itself started some 13.7 billion years ago with a Big Bang and it may end several billion years later.