An exact determination of the Hubble constant remains one of key problems in cosmology for almost a century. However, its modern values derived by various methods still disagree from each other by almost 10%, larger values being obtained by measurements at relatively small distances (e.g., by ...
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Now, we have no idea how fast everything is moving, but understanding this could help us understand the rate of expansion, the consistent speed at which the universe expands in something that has become known as the Hubble constant. Knowing that can help tell us when it began. To put it ...
The Hubble Constant is the unit of measurement used to describe the expansion of the universe. The cosmos has been getting bigger since the Big Bang kick-started the growth about 13.82 billion years ago. The universe, in fact, is getting faster in its acceleration as it gets bigger. ...
aEven though Hubble’s data were quite rough and not as precise as the modern ones, the law became generally accepted, and Einstein had to admit that the Universe is indeed expanding. It is said, that he called the introduction of the cosmological constant his “greatest mistake” (Eselei ...
I like the balloon analogy because it gives you a good sense of how the expansion works. In particular, the fact that more distant points recede from each other faster than points close together. The expansion rate right now is the Hubble Constant, about 70 kps per megaparsec. So two poi...
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Three Decades of Space Telescope Observations Converge on a Precise Value for the Hubble Constant Science history will record that the search for the expansion rate of the universe was the great Holy Grail of 20th-century cosmology. Without any observational evidence for space expanding, ...