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ProfBrianCox

@profbriancox.bsky.social

Professor of Particle Physics at The University of Manchester and Royal Society Professor for Public Engagement in Science

created July 26, 2023

71,063 followers 114 following 58 posts

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Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

Those were the days …. brains in buckets ….

31/8/2025, 7:24:54 AM | 1 0 | View on Bluesky | view

Profile picture The Francis Crick Institute (@crick.ac.uk) reposted

Join the live studio audience at the recording of our new podcast, A Question of Science 🎙️ On 21 March, we’re talking all things ageing with @statto.bsky.social, Paul Nurse, Linda Partridge and Lynne Cox. Book your free ticket to put your questions to the panel ⤵️ lostintv.com/aqos.htm

Promotional banner for 'A Question of Science' with Brian Cox. The title is in bold white text placed over a large black question mark. Surrounding the text are science-related images, including colorful capsules, a pink brain, and a bitten glazed donut. The Francis Crick Institute logo and the BBC Studios logo appear. Brian Cox’s face also appears at the bottom center.
12/3/2025, 5:25:12 PM | 36 6 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

Yes indeed - 20 years ago …. I don’t think we’ve changed much :-)

24/12/2024, 11:35:33 AM | 10 1 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

I think we should go for both - sort of like the 12 days of Christmas. A 2 week-long Feast of Astronomy.

22/12/2024, 8:57:31 AM | 28 3 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

Huge congratulations - I agree that completing a PhD is both tremendously difficult and tremendously rewarding.

11/12/2024, 7:37:40 PM | 39 2 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

It does doesn’t it! Total bollocks.

6/12/2024, 1:01:06 PM | 11 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

:-)

6/12/2024, 12:58:42 PM | 6 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

I could not agree more. I think most people vote optimistically - for the party they believe will offer a better future. Aiming for competence is not a compelling vision, although admittedly at the last election it was sufficient given the circumstances!

4/12/2024, 10:36:28 PM | 51 2 | View on Bluesky | view

Profile picture Chris Lintott (@chrislintott.bsky.social) reposted

In person tickets are full, but online viewers still very welcome for tomorrow's Gresham lecture.

3/12/2024, 1:32:41 PM | 67 10 | View on Bluesky | view

Profile picture Jacob Öberg (@profjacob.bsky.social) reposted

🚨🚨 "Brexit makes no sense in a world dominated by Trump. Britain’s place is back in the EU". Great column by @jonathanfreedland.bsky.social on #brexit and the election of Donald Trump which I think has been widely misconstrued in some quarters. /1 www.theguardian.com/commentisfre...

2/12/2024, 4:24:56 PM | 850 246 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

I don’t agree. I can’t see the big picture - what is the U.K’s place in the world? Are we to regain our place in Europe or attempt to be a lower-tax, deregulated country which is more US facing? The big strategic questions can’t be dodged much longer.

2/12/2024, 12:25:13 PM | 11 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

It’s called Titanic.

2/12/2024, 9:24:17 AM | 9 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

Yes. I’m pretty fed up with ‘red lines’.

2/12/2024, 9:19:48 AM | 10 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

I still agree with myself - I think that was 2014!

2/12/2024, 9:19:05 AM | 11 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social)

I would add that Labour’s relaunch reads as a list of policies they would like to enact if the plan works. But I don’t see a plan. In 2025 (in my view) they will have to either set the country on trajectory to rejoin SM and CU or align more closely with US. Rudderless mid-Atlantic is unsustainable.

2/12/2024, 9:12:07 AM | 290 55 | View on Bluesky | view

Profile picture Jonn Elledge (@jonnelledge.bsky.social) reposted

"Chris Rea is from Middlesbrough. This means that Driving Home For Christmas is essentially a song about being stuck in a traffic jam on the A1(M)." Anyway, it's December, and you know what that means.

1/12/2024, 9:27:45 AM | 383 69 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

It is the same, yes. Which leads to the twins paradox. The resolution is the symmetry between the clocks is broken when one accelerates (changes direction) to return and meet the other. If you google it, note that the AI summary is wrong. You don’t need General Relativity to deal with the problem.

27/11/2024, 7:35:39 AM | 3 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

Everyone has to have the same protection going down there whether they are mining or not - so I suppose it’s to do with mining!

22/11/2024, 1:14:42 PM | 0 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

It’s a very impressive operation. The first time I went down was in the late ‘90s. Maybe he was as manager then?

22/11/2024, 1:04:47 PM | 2 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social)

Spent the day at Boulby Underground Lab near Whitby - 1.1km underground. Dark matter searches, neutrino physics, very low cosmic ray and background radiation suitable for (amongst many other things) quantum computing. It’s a pretty unique facility and the mine is remarkable - over 100km of tunnels!

image
21/11/2024, 7:18:09 PM | 696 29 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social)

I finally started watching The Last of Us (I know I’m very late) and now I’m paranoid about getting athletes foot.

17/11/2024, 8:51:12 PM | 589 9 | View on Bluesky | view

Profile picture Dr Duncan Robertson (@duncanrobertson.bsky.social) reposted reply parent

This is really good bsky-follow-finder.theo.io

17/11/2024, 7:53:03 AM | 134 56 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

Greenfield originally. I used to live in Lydgate.

16/11/2024, 10:50:47 AM | 3 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

My family are from Saddleworth which really should be thought of as the West Riding of Yorkshire. Although I was born in Oldham and that is certainly Lancashire.

16/11/2024, 9:51:12 AM | 7 0 | View on Bluesky | view

Profile picture Emily Lakdawalla, Uranus Expert (@elakdawalla.bsky.social) reposted

The best thing about this image: the night side of Saturn. It’s not totally dark. Why not? Because it’s vaguely lit by light that has reflected from the rings. If you could somehow stand on the top of Saturn’s clouds, when it’s night, your world would be brightly lit by the huge yellow arc of rings.

16/11/2024, 7:19:03 AM | 550 93 | View on Bluesky | view

Profile picture Tom Irwin (@tomirwin.bsky.social) reposted

Good morning! If you've found my 'UK news and politics' starter pack useful to get you up and running on @bsky.app, please spread the word to new users by giving this a repost. Cheers! go.bsky.app/VNsC9bL

12/11/2024, 7:37:13 AM | 380 359 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

Yes. I’m the real one!

15/11/2024, 10:02:27 PM | 2 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

Sherry.

15/11/2024, 10:01:50 PM | 1 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

That’s great - say hello from me !

15/11/2024, 10:01:34 PM | 3 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

No - just under I presume !

15/11/2024, 9:47:23 PM | 0 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

That’s Taiyō …

15/11/2024, 9:36:57 PM | 2 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

I thought you’d be more interested in the biology than the engineering :-)

15/11/2024, 9:16:28 PM | 2 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

It’s not me to be fair - it’s Einstein. And yes, he’s right.

15/11/2024, 6:02:24 PM | 0 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

Won’t work. AI’s are sort of Californian and I’m from Oldham. Far more difficult to replicate.

15/11/2024, 5:13:36 PM | 6 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

Yes!

15/11/2024, 4:50:08 PM | 2 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

Yes indeed!

15/11/2024, 4:46:35 PM | 2 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

It’s the breed. I think it comes from the American Curl I initially

15/11/2024, 4:40:18 PM | 1 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

It’s just the rate of change of position generalised to spacetime. So velocity = dx/dt basically. Think miles per hour …

15/11/2024, 4:38:14 PM | 2 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

The problem with that joke is that everything with mass or energy generates its own gravity field.

15/11/2024, 4:35:59 PM | 8 1 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social)

And one last picture of my cat, just to round off this initial short series of physics and cat posts, this time with my radiator also in shot.

image
15/11/2024, 4:31:05 PM | 1342 26 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

I’ve got more chance of doing that than putting my feet on my head to be honest ..

15/11/2024, 4:16:30 PM | 3 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

Is he on here - is it the real Dara ?

15/11/2024, 4:14:31 PM | 0 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

Thank you :-)

15/11/2024, 4:13:59 PM | 1 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

But both phones would end up in the phone bag they make you put your phones in. Watch would work

15/11/2024, 4:12:21 PM | 1 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

I would recommend it of course - if you have the time and resources which is obviously a big if !

15/11/2024, 4:11:36 PM | 0 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

I just don’t like the k …

15/11/2024, 4:07:39 PM | 1 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

Thanks - I’ll look into that …

15/11/2024, 4:07:18 PM | 1 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

Yes. I think it’s ultimately doing the audience a favour - although you can’t buy a beer using Apple Pay ….

15/11/2024, 4:05:20 PM | 1 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

Maybe the other one is him.

15/11/2024, 4:04:09 PM | 1 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

Nice.

15/11/2024, 4:03:47 PM | 1 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

Also note that E =gamma mc^2 would appear to imply that massless particles should have zero energy - BUT for massless particle travelling at c, gamma goes to infinity and so the expression is undefined. Then we have E =pc from the equation in the notes. Nice :-)

15/11/2024, 4:03:10 PM | 4 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

I meant to type ‘kind of nob’ but I agree that can of nob is better

15/11/2024, 3:56:28 PM | 13 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

It’s worth a try though

15/11/2024, 3:55:45 PM | 1 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

Yep.

15/11/2024, 3:55:18 PM | 1 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

It’s great stuff :-)

15/11/2024, 3:51:32 PM | 2 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social)

Here’s a picture of my cat asleep with its feet on its head. I can’t do this.

image
15/11/2024, 3:50:10 PM | 996 26 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

Yo momma has such a large invariant mass that …..

15/11/2024, 3:43:06 PM | 14 1 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

I’m the real one - and I can prove it by noting that the others are nob ends.

15/11/2024, 3:42:13 PM | 11 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social)

I’ve been lecturing today at Manchester - special relativity - and for no good reason other than I want to post stuff here, here’s my lecture notes introducing the concept of invariant mass :-)

image
15/11/2024, 3:38:38 PM | 711 22 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social)

I am going to start following people by the way - just getting started :-)

14/11/2024, 10:54:27 AM | 2371 112 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

Yes! Uncompromising certainly :-)

14/11/2024, 10:53:25 AM | 2 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social)

I saw Bob Dylan last night at The Royal Albert Hall - it was wonderful. They made everyone put their phones in little bags so they couldn’t be used. I was ambivalent initially but the result was wonderful. Everybody just listened and the audience was dark. I think it’s a good thing. Thoughts?

14/11/2024, 10:44:01 AM | 1455 68 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

Why have you posted a picture of James Blunt?

14/11/2024, 9:35:31 AM | 13 1 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social) reply parent

I’m just getting started - give me a minute!

14/11/2024, 9:34:42 AM | 28 0 | View on Bluesky | view

Profile picture ProfBrianCox (@profbriancox.bsky.social)

Right. Hello. Is this place any good?

14/11/2024, 12:01:30 AM | 1131 74 | View on Bluesky | view