There was a huge secret before the release of the data.

We've had questions about is that expansion rate changing with time?

How fast is it expanding? What does that imply about the future?

Are we looking at limitations of the cosmological model?

Hello, welcome to the Supermassive podcast from the Royal Astronomical Society with me,

science journalist Izzy Clark and astrophysicist Dr. Becky Smathersst.

Recently, the astronomy community has had a little bit of a shake-up when it comes to

understanding just a little thing like the expansion of the entire universe.

There are a few ways to measure this rate of expansion. But in recent years, scientists have been getting

different results, which have opened up a big old can of worms when it comes to understanding

our universe. You know, like no biggie. I mean, so we are going to attempt to tackle the ins and outs of this.

This is what is known as the Hubble Tension.

And in this episode, we're going to be digging into what this is and, you know,

trying to explain the science behind it.

And are we setting off the Nobel Prize alarm yet?

Is he?

Woo!

Not for us personally, no, but we are for one of our guests.

So I can confirm we have our first Nobel Prize winning guest on the show.

That's Professor Adam Rees, who studies the expansion rate with nearby galaxies.

And I also spoke with the brilliant Professor Sylvia Galley, who measures the expansion

rate using the cosmic microwave background. So we'll get their thoughts on all of this in a moment.

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