The Large Magellanic cloud. Credit: CTIO/NOIRLab/NSF/AURA/SMASH/D. Nidever (Montana State University) Image processing: Travis Rector (University of Alaska Anchorage), Mahdi Zamani & Davide de Martin.
The Large Magellanic cloud. Credit: CTIO/NOIRLab/NSF/AURA/SMASH/D. Nidever (Montana State University) Image processing: Travis Rector (University of Alaska Anchorage), Mahdi Zamani & Davide de Martin. A fresh look at red giant stars offers key insights into cosmic distance measurements and a way to measure the Universe's expansion with the highest accuracy. In a constantly expanding universe, measuring cosmic distances is like trying to find a reliable ruler in a vast, ever-stretching fabric. One tool that astrophysicists use is the Hubble constant, (H0), which measures how fast the Universe is expanding and sets the age and observable size of the Universe. However, there is disagreement over the value of H0, due to conflicting measurements derived from various celestial objects.
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