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Images: Peering Back to the Big Bang & Early Universe

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Big Bang Diagram

Credit: NASA
The Big Bang theory proposes that the universe began as an extremely hot and dense dot only a few millimeters wide. It since grew over 13.7 billion years…Read More »





into the vast and cooler expanding cosmos that presently exists. An extension of the Big Bang model, inflation, poses that the universe initially expanded far faster than the speed of light and grew from a subatomic size to a golf-ball size almost instantaneously, shown in this diagram.

It took quite a bit more than seven days to create the universe as we know it today. SPACE.com looks at the mysteries of the heavens in our series: The History & Future of the Cosmos. This is Part 2 in that series.   Less «
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