BIG AND SMALL ARE RELATIVE AND VARIABLE - LOOK AT THE STARS

We assess all visible things by its size. The bigger the size, bigger the power. But the truth is that the size has nothing to do with what it is. This gigantic universe is estimated to have a diameter of 93 billion light years. Nothing to think about it because that is beyond our conception. But this, so big universe was a tiny particle at the beginning of time according to the Big Bang theory. Everything what is seen or unseen in this universe came into existence from that tiny particle. It may be beyond our imagination.

The great stars which are much bigger than our sun shall collapse into a no mass state one day. And comes a new star from near nothingness.  Atoms of light elements are squeezed under enough pressure for their nuclei to undergo fusion. All stars are the result of a balance of forces: the force of gravity compresses atoms in interstellar gas until the fusion reactions begin. And once fusion reactions begin, they exert an outward pressure. As long as the inward force of gravity and the outward force generated by the fusion reactions are equal, the star remains stable.

Similarly when a star like our sun, when burned all of its hydrogen fuel, it expands to become a red giant. After puffing off its outer layers, the star collapses to form a very dense white dwarf. When they swell into red super giants, they try to keep alive by burning different fuels, but this only works for a few million years. Then they blow themselves apart in a huge supernova explosion.

(Indebted to the article by Richard Bill, Associate Professor at Honolulu Community College)

K V George