The Sky at Night - Is Cosmology in Crisis ? episode 2 2019: ever since we discovered that distant galaxies are racing away from us, there has been a heated debate over just how fast the Universe is expanding. At the beginning of the 21st century, we thought we knew the answer. But now, two very different viewpoints have emerged. And they are dividing the scientific community.
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More at:
https://hdclump.com/category/science/
https://hdclump.com/tag/astronomy/
https://hdclump.com/tag/space-exploration/
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