A University of Arizona-led team of astronomers found that the type of supernovae commonly used to measure distances in the universe fall into distinct populations not recognized before. The findings have implications for our understanding of how fast the universe has been expanding since the Big Bang.
"To be clear, this research does not suggest that there is no acceleration," Milne said, "just that there might be less of it."
"We're proposing that our data suggest there might be less dark energy than textbook knowledge, but we can't put a number on it," he added. "Until our paper, the two populations of supernovae were treated as the same population. To get that final answer, you need to do all that work again, separately for the red and for the blue population."
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