Hubble delves into cosmic history
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December 15, 2012 |
When I was stargazing last night I started wondering about how it all started. The universe is thought to be 13.7 billion years old. So were the stars I see in the night sky around back then? The answer is no, but the Hubble Space Telescope has captured images of the oldest stars it has found so far, and they’re over 13 billion years old!
Although they’re not the first stars ever to form, their discovery will help scientists understand why the universe looks the way it does now. The light from these stars takes so long to get here that Hubble is looking far back in time when it sees them.
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This is the closest we have come to looking at the stars that first made the chemical elements needed for life, such as oxygen.
Image: ESA
