The Hubble Space Telescope has helped solve huge questions about space. Coming next: Its successor will look back even further into time.
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Age of the universe One of Hubble's biggest accomplishments was pinpointing the precise age of the universe. The telescope has been able to measure the brightness of dozens of pulsating stars, a thousand times brighter than the Sun. The brightness allows astronomers to calculate the distance of the stars from Earth. By combining this Hubble study and other analyses, astronomers have determined that the universe is about 13.75 billion years old.