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Hakeem Oluseyi

๐Ÿ‘ค Speaker
304 total appearances

Appearances Over Time

Podcast Appearances

StarTalk Radio
Hubble Trouble with Hakeem Oluseyi

Clickbait, yeah. Right, exactly. It's clickbait, right? So essentially what's been happening is you have the cosmic microwave background radiation, which has been a treasure trove of cosmological information. Then you have the standard way that we measure expansion. I have some object, I know- How fast it's moving? How fast it's moving away, it's redshift.

StarTalk Radio
Hubble Trouble with Hakeem Oluseyi

Clickbait, yeah. Right, exactly. It's clickbait, right? So essentially what's been happening is you have the cosmic microwave background radiation, which has been a treasure trove of cosmological information. Then you have the standard way that we measure expansion. I have some object, I know- How fast it's moving? How fast it's moving away, it's redshift.

StarTalk Radio
Hubble Trouble with Hakeem Oluseyi

And I also know its distance based on its brightness, right? And so now I can make a Hubble diagram. I fit the Planck data, I get a value of the Hubble constant.

StarTalk Radio
Hubble Trouble with Hakeem Oluseyi

And I also know its distance based on its brightness, right? And so now I can make a Hubble diagram. I fit the Planck data, I get a value of the Hubble constant.

StarTalk Radio
Hubble Trouble with Hakeem Oluseyi

I be saying stuff, don't you know, I be leaving stuff out, man.

StarTalk Radio
Hubble Trouble with Hakeem Oluseyi

I be saying stuff, don't you know, I be leaving stuff out, man.

StarTalk Radio
Hubble Trouble with Hakeem Oluseyi

Thank you, thank you.

StarTalk Radio
Hubble Trouble with Hakeem Oluseyi

Thank you, thank you.

StarTalk Radio
Hubble Trouble with Hakeem Oluseyi

So now there's new... James Webb Space Telescope data.

StarTalk Radio
Hubble Trouble with Hakeem Oluseyi

So now there's new... James Webb Space Telescope data.

StarTalk Radio
Hubble Trouble with Hakeem Oluseyi

So we had a similar problem with the ages of stars and the age of the universe, which depends on the Hubble thing, right? And so it was the cosmological data that had to be adjusted.

StarTalk Radio
Hubble Trouble with Hakeem Oluseyi

So we had a similar problem with the ages of stars and the age of the universe, which depends on the Hubble thing, right? And so it was the cosmological data that had to be adjusted.

StarTalk Radio
Hubble Trouble with Hakeem Oluseyi

That's right. Stars in the halo looked like they were older than the age of the universe, right? And the headlines were, oh, catastrophe. Oh, my God. Yeah, people like ready to give up on the universe. But then we realize, oh no, our cosmology needs to be improved. And so, you know, what happened in the 90s, really, you know, post-Kobe, that changed everything in cosmology, right? Not Kobe Bryant.

StarTalk Radio
Hubble Trouble with Hakeem Oluseyi

That's right. Stars in the halo looked like they were older than the age of the universe, right? And the headlines were, oh, catastrophe. Oh, my God. Yeah, people like ready to give up on the universe. But then we realize, oh no, our cosmology needs to be improved. And so, you know, what happened in the 90s, really, you know, post-Kobe, that changed everything in cosmology, right? Not Kobe Bryant.

StarTalk Radio
Hubble Trouble with Hakeem Oluseyi

Not Kobe Bryant.

StarTalk Radio
Hubble Trouble with Hakeem Oluseyi

Not Kobe Bryant.

StarTalk Radio
Hubble Trouble with Hakeem Oluseyi

Nobel laureates, yeah, yeah.

StarTalk Radio
Hubble Trouble with Hakeem Oluseyi

Nobel laureates, yeah, yeah.

StarTalk Radio
Hubble Trouble with Hakeem Oluseyi

Yeah, something's got to give. So I think that there's something that we don't understand. I think I'm trusting the measurements, and I think that I trust the theory. The measurements look good, don't they? The measurements look good. I was involved in supernova cosmology, right? And also weak lensing studies for looking at structure of growth and these sort of things.

StarTalk Radio
Hubble Trouble with Hakeem Oluseyi

Yeah, something's got to give. So I think that there's something that we don't understand. I think I'm trusting the measurements, and I think that I trust the theory. The measurements look good, don't they? The measurements look good. I was involved in supernova cosmology, right? And also weak lensing studies for looking at structure of growth and these sort of things.