Expanding Universe
by Science Photo Library
Title
Expanding Universe
Artist
Science Photo Library
Medium
Photograph - Photograph
Description
Expanding universe. Illustration showing the universe expanding over time (left to right). Matter formed after the Big Bang, the initial expansion of the universe from an infinitely compact state 12-15 billion years ago. Around 100 million years after the Big Bang, the first stars and galaxies formed. On the largest scale, the galaxies are observed to be moving away from each other. This is due to the expansion of the universe. A common analogy is to imagine the universe and its galaxies as being contained on the surface of an expanding bubble.
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September 13th, 2018
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