![]() Scientists use cosmic mile markers such as distant galaxies and stars to track how far and how fast the universe has expanded. The same would go for measuring how fast the universe expands. When tracking the growth of a child, one might mark a door frame indicating the child’s height, date and time. Scientists measure the expansion of the universe using the Hubble constant (Ho). How is the expansion of the universe measured? ![]() So now we have to really put our thinking caps on and understand why is it that you can’t go from the beginning of the universe to the end with a story that connects the two and something breaks down along the way," Riess added. We’ve done too many measurements and cross-checked them too much to say it’s bad luck. "So we’re at a point now where it’s not just bad luck that these don’t match each other. Which is strange but exciting because in science, any time something doesn’t match your model, you have the potential to learn more about your model or your understanding," Riess told FOX TV Stations. "The funny thing is, it doesn’t match the prediction. However, Riess’ team showed the universe is actually expanding 73 plus or minus 1 kilometer per second per megaparsec, which predicts the size of the universe will double in about 10 billion years. Previous measurements predicted the universe was expanding at a rate of 67.5 plus or minus 0.5 kilometers per second per megaparsec, according to NASA. When comparing measurements from previous data and the current data, Riess’ team found that the rate at which the universe is expanding was off. "You are getting the most precise measurement of the expansion rate for the universe from the gold standard of telescopes and cosmic mile markers," Riess said.
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