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2022-08-17: What If Dark Energy is a New Quantum Field?
- 06:25: ... second reason is the so-called Hubble tension.When we measure the Hubble constant - the current rate of expansion of the universe, based on supernova ...
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2021-03-16: The NEW Crisis in Cosmology
- 04:42: ... can give us the expansion rate. The Planck team calculated a Hubble constant of 67.6 km/s/Mpc - let’s not worry about the ...
- 09:17: ... in turn gave Adam Reiss and team a refined measure of the Hubble constant. So what do you think - do the supernova and Planck results ...
- 10:08: ... seem to be coming on the side of the Planck result - a Hubble constant in the high ...
- 10:40: ... and so the uncertainty is large - but published results give a Hubble constant in the low 70s - so in agreement with the supernova guys. ...
- 11:57: ... waves from merging black holes to measure the Hubble constant. These waves get stretched by the expanding universe, just ...
- 04:42: ... can give us the expansion rate. The Planck team calculated a Hubble constant of 67.6 km/s/Mpc - let’s not worry about the weird units right now. ...
- 05:31: ... method. A couple of years ago his team published a new Hubble constant of 73 and a half.+/- 1.5 ...
- 09:17: ... and Planck results agree? Not in the least. The Gaia-based Hubble constant of 73.2 km/s/mpc seems to confirm the previous type-1a ...
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2020-05-04: How We Know The Universe is Ancient
- 06:22: ... rate is encapsulated in something we call the Hubble constant, which just tells how fast a galaxy is moving away from us given its ...
- 08:58: ... had been using to get distances to galaxies, and so calculate the Hubble constant and the age of the universe. It’s similar to the Cepheid method because ...
- 09:39: ... He eventually concluded that the expansion rate of the universe – the Hubble constant – was about 75 kilometers per second per megaparsec. Now, don't worry ...
- 06:22: ... thousands of astronomers have devoted their lives to measuring the Hubble constant - and a big part of the motivation is that it tells us the age of the ...
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2019-02-20: Secrets of the Cosmic Microwave Background
- 14:23: ... for this is that the authors of that paper use a different value for the Hubble constant See, the quoted distance is the co-moving distance It's the size the ...
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2019-02-07: Sound Waves from the Beginning of Time
- 01:04: ... talked about one of those properties in a recent episode, The Hubble constant, and about a growing conflict in its measured value, which hints at ...
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2019-01-24: The Crisis in Cosmology
- 00:02: The search for a single number, the Hubble constant,...
- 01:12: We encapsulate the expansion of the universe with a single number, called the Hubble constant.
- 02:05: ...used to measure this fundamental parameter, the Hubble constant,...
- 02:10: But before we get to that, let's talk about the great quest to measure the Hubble constant.
- 02:39: If the Hubble constant were, say, 75 km per second per megaparsec,...
- 02:51: Historically, measurement of the Hubble constant...
- 04:15: ...and the precise measurement of the Hubble constant...
- 04:59: ...astronomers were using these supernovae to better nail down the Hubble constant.
- 05:44: Recent teams have now narrowed down the Hubble constant to 73.5 ± 1,7...
- 07:54: So,... how can the CMB tell us the Hubble constant?
- 09:09: So, how do you get the Hubble constant, i.e., the current expansion rate, from all of this?
- 12:26: The answer will depend on whether the more correct measurement of the Hubble constant...
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2016-06-15: The Strange Universe of Gravitational Lensing
- 05:57: ... distance measurements have allowed us to measure the Hubble Constant, which tells us the rate of expansion of the universe, independently ...
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2016-04-27: What Does Dark Energy Really Do?
- 08:41: The Hubble Constant is just the Hubble Parameter for the present day.
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2016-04-13: Will the Universe Expand Forever?
- 07:18: The expansion rate now is what we call the "Hubble constant." It's around 70 kilometers per second per megaparsec.
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