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The Beginning of Everything -- The Big Bang
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مستوى CEFR
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The beginning of everything.
The Big Bang.
The idea that the universe was suddenly born and is not infinite.
Up to the middle of the 20th century, most scientists thought of the universe
as infinite and ageless.
Until Einstein’s theory of relativity gave us a better understanding of gravity,
and Edwin Hubble discovered that galaxies are moving apart from one another
in a way that fits previous predictions.
In 1964, by accident, cosmic background radiation was discovered,
a relic of the early universe,
which, together with other observational evidence, made the Big Bang
the accepted theory in science.
Since then, improved technology like the Hubble telescope
has given us a pretty good picture of the Big Bang and the structure of the cosmos.
Recent observations even seem to suggest that the expansion of the universe
is accelerating.
But how did this Big Bang work?
How can something come from nothing?
Let’s explore what we know.
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