Uncovering the Universe: Latest news from the LHC

[Campbellr1982]

How is it possible that space has limits and its been proven that the universe is expanding reaching further out into space. It would have to stop nothin is never ending! So what is after the end of space?

[pacman211]

@Campbellr1982 great question,i've always wondered along the same lines..i mean what beyond the boundaries?

[sbergman27]

@Campbellr1982 There's actually quite a lot you have to understand to even understand that question. Short answer, our Observable Universe is finite. It's unknown whether The Universe is infinite. It could be finite & expanding or infinite & expanding. 'Observable Universe' is usually what we mean when we say 'Universe', but it is quite a different thing. You might start by studying the Wikipedia article on 'Observable Universe' first. And then consider & refine your question.

[sbergman27]

@Campbellr1982 On second thought, perhaps you might prefer to start with: /watch?v=MoTNGmlOO2g

[Campbellr1982]

If the universe is expanding what is it expanding into?

[sbergman27]

@Campbellr1982 We're talking about the very geometry of space. It makes no sense to think that it should have to expand into anything. It's simply expanding. It may be infinite in extent or it may not. But the important thing is that metrics between points within it are increasing geometrically with time. Note that objects bound by forces, like the solar system, or your sofa, are not expanding. But structure @ great relative distance, say galaxy clusters, do recede from other galaxy clusters.

[Campbellr1982]

I know the answer to the beginning of time...i think the universe is not that big and we are actually very very small just an explosion in a box and that's were we live. We think its big but its not. And not that special just dust particles floating around

[Campbellr1982]

She lectures in Liverpool uni. I think they are looking for something what's not there! And why did they have to build a 20km machine that cost billions if they don't know if the particle exsist why could the just made a smaller one half the price. I don't see how they can test for something what there not sure that it even exsist. If they found it we would know by now.

[alvinabejuro]

this LHC people are keeping tons of liguid helium in a container inside their tunnel.which they know in total much colder than north pole , what if this liquid helium leak uncontrolably? this people will make Switzerland and France colder than north pole.and it will affect the global weather! damn.it is only about the helium , how about the other risks.

[sbergman27]

@alvinabejuro "this people will make Switzerland and France colder than north pole.and it will affect the global weather!"

Vaporizing the 96 metric tons of He & raising it to ambient temperature would take in only enough heat to decrease the temperature of an Olympic-sized swimming pool by ~6C.

How can people be so stupid as this alvinabejuro guy? And after saying something so stupid, why would such people think anyone would listen to the rest of their ignorant 'chicken little' tripe?

Sheesh!

[alvinabejuro]

@sbergman27 go back to school and ask your chemistry teacher what can really happen if your 96 metric tons of He will escape from the tunnel uncontrolably,you will know that things will not happen the same way you think and what you had written here , your just guessing , man. havent you think why this LCH people build a very strong tunnel very deep underground? its not for the beam but its for the He if it leaks uncontrolably , you fag..t , dick head.........MOK MAFFI

[sbergman27]

@alvinabejuro You're foaming a bit, there. Helium is inert. In fact, it's the most inert element in the periodic table. It's not a greenhouse gas; It simply doesn't absorb/radiate in that spectrum. I've already shown you up on your ignorant "It'll make everything cold!" hysteria with a simple back of the napkin calculation that you could do if you possessed a junior high level of science knowledge. Call me names. But it would be more effective if you presented facts.. except you don't have any.

[dssxdss]

♫♫♫♫♫♫♫♫♫♫♫♫

In the big bang we had equal amounts of matter and anti-matter

And as soon as they met each other,

They annihilated together

And this battle played out

Whilst the universe expanded

In its first minute of existence

♫♫♫♫♫♫♫♫♫♫♫♫

[HiAdrian]

Great talk. So many physicists (and representatives) make awful speakers. She's done an excellent job.

I second impussybull's notion, seeing the slides would have been nice.

[impussybull]

Incredible presentation! The only flaw is the absence of the presentation slides on this video. It would be very interesting to see the pictures shown to the audience.

[chinamanspeakenlis]

amamzing, just amazing. im lucky to be livin in this age, thank god i wasnt livin in ancient times where almost every one was ignorant as f u c k and writing scriptures and creating their own cults.

[genericmember1]

This video would be great for anyone who wants to understand particle physics, she is so clear and precise while making accessible at the same time. That's no small feat.

My PhD supervisor worked at CERN (back in the days of LEP) and it's quite strange to think of the journey the work at CERN has taken since then.