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Secrets of Size: Atoms to Supergalaxies

We can't detect it directly, but it must be thereto hold our galaxy together

We can't detect it directly, but it must be there
to hold our galaxy together

Full Transcript

00:00:01.000 --> 00:00:03.439
We can't detect it directly,
00:00:03.044 --> 00:00:07.008
but it must be there to hold our galaxy together.
Duration
7 seconds
Views
20
Timestamp in Movie
00:27:57
Uploaded
May 06, 2025
Season
1
Episode
2
Genres
documentary

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Movie Summary

In this mind-bending series, Jim Al-Khalili explores the vast range of size in the universe, from tiny atoms to gigantic, interconnected galaxies.
S01 • E02 Most cosmologists now think our galaxy is surrounded - Secrets of Size: Atoms to Supergalaxies 00:11
Most cosmologists now think our galaxy is surrounded
S01 • E01 So this is the full cell? The full bacteria? Yeah. - Secrets of Size: Atoms to Supergalaxies 00:05
So this is the full cell? The full bacteria? Yeah.
S01 • E02 Some estimates say it could be up to two million light years across. - Secrets of Size: Atoms to Supergalaxies 00:06
Some estimates say it could be up to two million light years...
S01 • E01 So you can sort of start to see features on the surface. - Secrets of Size: Atoms to Supergalaxies 00:06
So you can sort of start to see features on the surface.
S01 • E02 The light we can see with our own eyes - Secrets of Size: Atoms to Supergalaxies 00:08
The light we can see with our own eyes
S01 • E01 And these are already well below optical microscopy kind of sizes. - Secrets of Size: Atoms to Supergalaxies 00:06
And these are already well below optical microscopy kind of ...
S01 • E02 That's because many astronomical objects give off radiation - Secrets of Size: Atoms to Supergalaxies 00:10
That's because many astronomical objects give off radia...
S01 • E01 Right. My scan's going to be 500 nanometres wide. - Secrets of Size: Atoms to Supergalaxies 00:05
Right. My scan's going to be 500 nanometres wide.
S01 • E01 So we're now looking at the surface of the bacteria? Yes. Yes. - Secrets of Size: Atoms to Supergalaxies 00:04
So we're now looking at the surface of the bacteria? Ye...
S01 • E01 This is really impressive. - Secrets of Size: Atoms to Supergalaxies 00:04
This is really impressive.
S01 • E01 What we're looking at here is bacteria skin - Secrets of Size: Atoms to Supergalaxies 00:14
What we're looking at here is bacteria skin
S01 • E02 On this end you have gamma rays, - Secrets of Size: Atoms to Supergalaxies 00:06
On this end you have gamma rays,
S01 • E02 Then X-rays and then ultraviolet. - Secrets of Size: Atoms to Supergalaxies 00:04
Then X-rays and then ultraviolet.
S01 • E02 On this side you have infrared radiation - Secrets of Size: Atoms to Supergalaxies 00:11
On this side you have infrared radiation
S01 • E01 Each one of these black spots is a hole on the bacteria, - Secrets of Size: Atoms to Supergalaxies 00:10
Each one of these black spots is a hole on the bacteria,
S01 • E02 And this slice in the middle, this is visible light. - Secrets of Size: Atoms to Supergalaxies 00:04
And this slice in the middle, this is visible light.
S01 • E01 These are the holes that let water and nutrients - Secrets of Size: Atoms to Supergalaxies 00:08
These are the holes that let water and nutrients
S01 • E02 It's what our eyes - Secrets of Size: Atoms to Supergalaxies 00:04
It's what our eyes
S01 • E02 The rest of the spectrum is, - Secrets of Size: Atoms to Supergalaxies 00:05
The rest of the spectrum is,
S01 • E01 So we're looking at how they're arranged, relative to each other. - Secrets of Size: Atoms to Supergalaxies 00:05
So we're looking at how they're arranged, relative...