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Science Weekly

James Webb space telescope: thousands of galaxies in a grain of sand

Science Weekly

The Guardian

Science

4.21K Ratings

🗓️ 14 July 2022

⏱️ 15 minutes

🧾️ Download transcript

Summary

This week, Nasa unveiled the first images from the James Webb space telescope – much awaited pictures that show our universe in glorious technicolour. The $10bn telescope, now 1 million miles from Earth, will allow scientists to look back to the dawn of time. Prof Ray Jayawardhana, who is working with one of the instruments onboard the JWST, speaks to Ian Sample about what these images show us, and what they mean for the very human quest of discovering our place in the cosmos.. Help support our independent journalism at theguardian.com/sciencepod

Transcript

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0:00.0

This is the present. It's not often you get the President of the United States announcing the results from a science experiment.

0:29.0

Light from other worlds, orbiting stars, far beyond our own.

0:34.4

It's astounding to me when I read this.

0:36.7

The James Webb Space Telescope, the largest

0:39.4

and most powerful space-based observatory ever built, took decades to make it to the launch pad.

0:45.0

And lift-off.

0:47.0

Decolage lift-off from a tropical rainforest to the edge of time itself,

0:53.6

James Webb begins a voyage back to the birth of the universe.

0:58.8

After major delays, threaten cancellations and spiraling costs, the $10 billion telescope is now in position,

1:06.4

one million miles from Earth, and finally observing the universe.

1:11.8

If you heard our episode on Web back in December 2021, you'll know just how nail-biting the weight has been.

1:18.0

But the flurry of images out this week has proved it all worthwhile.

1:22.0

We've seen galaxies as they were 13.1 billion years ago,

1:27.1

water vapor in the atmosphere of a world beyond the solar system, and the glittering

1:31.6

landscape of a stellar nursery home to stars many times larger than the sun.

1:36.5

And this is only the start.

1:39.2

So what do these images really mean for astronomers and what could Web mean for us and our understanding of our place in the universe?

1:51.0

I'm Ensemble The Guardian Science Editor and this is Science Weekly.

1:57.0

Now before we start if you're listening on a computer or phone right now take a moment to open your web browser

2:10.3

click on a new tab and search for the JWST first image, because if you haven't seen it, it's absolutely breathtaking.

2:18.0

This incredible dense collection of galaxies, each filled with billions and billions of stars, shows some as they

2:26.1

were more than 13 billion years ago. Just take it in for a second. To unpick what's in this image and what else Webb will be revealing to us in the

...

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