The Big Bang Theory
About 14 billion years ago the universe materialized out of nothing for unknown reasons. infinity smaller than an atom to begin with, the universe expanded to trillion kilometres across in under second an event called the big bang
Time came into existence and the universe began to show the question “what happened before”? Has no meaning. Space also came into existence. The Big Bang was not an explosion of matter through space - it was an expansion of space itself.
First the Universe consisted of pure energy, but within a trillionth of the 2nd sum of this energy turned into matter, forming a vast soup of subatomic particles (particles smaller than atoms). It took nearly 400, 000 for the particles to cool down enough form atoms, and then another million years before the atom formed planets, stars and galaxies that begin in the big bang continues to this day , most scientist think it will carry on forever
The expanding universe
The illustration below does not show the universe, which is unknown instead, it is a timeline how the universe has expanded and changed since the big bang. The universe is expanding because the most distant galaxies are rushing apart at fantastic speeds. By running the clock backward, astronomers figure out that the expansion begin 13.8 billion years ago mangal the big bang
How discovered the big bang?
Discovery of the big bang
The first scientific evidence for the Big Bang was found in 1929 when astronomers observed that light from distant galaxies was reddened . This color change happens when object are moving away from us, making light waves and change color. The more distant the Galaxies are, they are rushing away. Deep shows that the whole universe is expanding
No Change In Star light
Light Wave Stretched
Light Wave StretchedBig bang afterglow
More evidence Of the big bang came in the 1960s when astronomers detected faint microwaves coming from every point in the sky. This mystery of energy is the faded remains of the instances burst of energy released in the big bang
Big Bounce theory
What caused the big bang? We may never know for sure, but some scientists have suggested that there may have been lots of big bangs, the universe expanding after each one and then shrinking again. Is called the big Bounce because the process repeat itself
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