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As our galaxy revolves around the centre
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Secrets of Size: Atoms to Supergalaxies

As our galaxy revolvesaround the centre, what keeps it all togetheris the mass of all...

As our galaxy revolves
around the centre, what keeps it all together
is the mass of all those stars and gas and dust acting as
a kind of gravitational glue

Full Transcript

00:00:01.000 --> 00:00:04.199
As our galaxy revolves around the centre,
00:00:04.002 --> 00:00:08.439
what keeps it all together is the mass of all those stars
00:00:08.044 --> 00:00:13.959
and gas and dust acting as a kind of gravitational glue.
Duration
14 seconds
Views
25
Timestamp in Movie
00:25:58
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 • E01 And that's what the gecko is taking advantage of. - Secrets of Size: Atoms to Supergalaxies 00:05
And that's what the gecko is taking advantage of.
S01 • E02 During the second half of the 20th century, - Secrets of Size: Atoms to Supergalaxies 00:09
During the second half of the 20th century,
S01 • E01 A gecko's feet are covered with billions of tiny structures - Secrets of Size: Atoms to Supergalaxies 00:08
A gecko's feet are covered with billions of tiny struct...
S01 • E02 She worked with instruments that could measure it - Secrets of Size: Atoms to Supergalaxies 00:06
She worked with instruments that could measure it
S01 • E01 When these press against the glass, - Secrets of Size: Atoms to Supergalaxies 00:07
When these press against the glass,
S01 • E02 As she did the maths, she realised something extraordinary. - Secrets of Size: Atoms to Supergalaxies 00:05
As she did the maths, she realised something extraordinary.
S01 • E02 OK, so we've shrunk the Milky Way - Secrets of Size: Atoms to Supergalaxies 00:09
OK, so we've shrunk the Milky Way
S01 • E01 Billions of atoms are now in contact. - Secrets of Size: Atoms to Supergalaxies 00:04
Billions of atoms are now in contact.
S01 • E02 Now, Vera Rubin was one of the leading figures - Secrets of Size: Atoms to Supergalaxies 00:09
Now, Vera Rubin was one of the leading figures
S01 • E01 Then the tiny van der Waals forces - Secrets of Size: Atoms to Supergalaxies 00:07
Then the tiny van der Waals forces
S01 • E01 And this was one of the forces - Secrets of Size: Atoms to Supergalaxies 00:07
And this was one of the forces
S01 • E02 We've set it up so we've mapped in - Secrets of Size: Atoms to Supergalaxies 00:05
We've set it up so we've mapped in
S01 • E01 When a tiny stylus - - Secrets of Size: Atoms to Supergalaxies 00:13
When a tiny stylus -
S01 • E02 And now if we just set it rotating - Secrets of Size: Atoms to Supergalaxies 00:07
And now if we just set it rotating
S01 • E02 As the galaxy revolves, - Secrets of Size: Atoms to Supergalaxies 00:07
As the galaxy revolves,
S01 • E01 Just like the spatulae on the foot of a gecko - Secrets of Size: Atoms to Supergalaxies 00:19
Just like the spatulae on the foot of a gecko
S01 • E02 And the problem is, if we just take all the mass that we have here - Secrets of Size: Atoms to Supergalaxies 00:07
And the problem is, if we just take all the mass that we hav...
S01 • E01 Measuring minuscule forces like these can paint a picture - Secrets of Size: Atoms to Supergalaxies 00:08
Measuring minuscule forces like these can paint a picture
S01 • E02 It can't provide enough gravity to stop the galaxy - Secrets of Size: Atoms to Supergalaxies 00:06
It can't provide enough gravity to stop the galaxy
S01 • E01 This is a modern atomic force microscope. - Secrets of Size: Atoms to Supergalaxies 00:04
This is a modern atomic force microscope.