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Hubble finds universe may be expanding faster than expected

This illustration shows the three steps astronomers used to measure the universe’s expansion rate to an unprecedented accuracy, reducing the total uncertainty to 2.4 percent. Astronomers made the measurements by streamlining and strengthening the construction of the cosmic distance ladder, which is used to measure accurate distances to galaxies near and far from Earth. Beginning …

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Dozens of new variable stars found in a dense globular cluster

Messier 54 as imaged by the Hubble Space Telescope. Credit: ESA/Hubble & NASA June 1, 2016 by Tomasz Nowakowski (Phys.org)—Located some 87,000 light years away, a dense globular cluster named Messier 54 (also known as NGC 6715) is a real gold mine for astronomers. Recently, an international team has discovered dozens of new variable stars …

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Close-up view of galaxies prompts re-think on star formation

This is the “South Pillar” region of the star-forming region called the Carina Nebula. Like cracking open a watermelon and finding its seeds, the infrared telescope “busted open” this murky cloud to reveal star embryos tucked inside finger-like pillars of thick dust. Credit: NASA November 10, 2015 Astronomers have identified for the first time one …

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Astronomers discover oldest stars ever seen

The chemical makeup of these ancient stars points to huge explosions called hypernovae. Credit: ESO November 11, 2015 An international team of astronomers, led researchers from the University of Cambridge and the Australian National University, have identified some of the oldest stars in our galaxy, which could contain vital clues about the early Universe, including …

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