The Universe

[lord bunberry]

I know there's quite a few posters on here who are interested in matters of the cosmos, so I thought I'd start a thread to keep us all together.
Im currently watching a documentary on dark matter, a subject that I find fascinating. The latest theory seems to be that it is comprised from a particle called wimps, meaning weakly interacting massive particles. Given that the universe is made up of 84% dark matter, this reasearch is extremely important. I've been trying to understand all this sort of stuff by reading books on quantum physics and theoretical physics, but I have to say I'm no further forward on the subject.
What excites me the most is that the endless scope for speculation is absolutely absolute.
I don't mean this thread to be just about dark matter when there's so many other exiting things happening right now like the possibility of a 9th planet and the discovery of a possible earth like planet orbiting our nearest star.

[lord bunberry]

Maybe not then
come on there's been stuff on the news about Enceladus tonight. Someone must be as excited about that as me.

[Jack]

There was a programme on BBC 4 the other night about travelling to Mars and all the pros and cons. That was interesting.

[lord bunberry]

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There was a programme on BBC 4 the other night about travelling to Mars and all the pros and cons. That was interesting.

BBC 4 is great for that sort of thing. I think we'll go to Mars in the next 10 years and find evidence of past life there and possibly even living things now.

[Hibrandenburg]

Neil deGrasse Tyson's Cosmos is a good watch too.

[The_Exile]

Looks like Enceladus is likely to have microbial life under the ice sheet as there's now confident heat vents exist in the ocean beneath, this is what's causing the eruptions from the surface. Whilst not exactly ET as we would expect it, it just shows how incredible common "life" might be on other worlds. My Physics teacher always told us we'd find life or evidence of it on another world within our lifetimes and looks like he was right! Although he also said Betelgeuse would go supernova in our lifetime too (highly unlikely but it could happen tomorrow theoretically!). 1 out of 2 ain't bad I suppose.

[lord bunberry]

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Looks like Enceladus is likely to have microbial life under the ice sheet as there's now confident heat vents exist in the ocean beneath, this is what's causing the eruptions from the surface. Whilst not exactly ET as we would expect it, it just shows how incredible common "life" might be on other worlds. My Physics teacher always told us we'd find life or evidence of it on another world within our lifetimes and looks like he was right! Although he also said Betelgeuse would go supernova in our lifetime too (highly unlikely but it could happen tomorrow theoretically!). 1 out of 2 ain't bad I suppose.

Apparently if it does go supernova it will be enough to make it light at night time.

[Hibrandenburg]

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Apparently if it does go supernova it will be enough to make it light at night time.

It could have gone supernova about 600 years ago.

[lord bunberry]

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It could have gone supernova about 600 years ago.

I think it's 430 light years away.

[Hibrandenburg]

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I think it's 430 light years away.

642.5. Start stocking up on sunblock.

[lord bunberry]

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642.5. Start stocking up on sunblock.

I googled it after my post and every site says something different, but seeing your figure has got a .5 in it I'm going with it

[Hibrandenburg]

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I googled it after my post and every site says something different, but seeing your figure has got a .5 in it I'm going with it

[Hibby Bairn]

So how did the universe form?

[lord bunberry]

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So how did the universe form?

From the Big Bang. Everything came into being from an explosion that has been expanding for 14m years. There's no real quick way to describe it to be honest.
http://www.bbc.co.uk/schools/gcsebit...bangrev1.shtml

[Hibby Bairn]

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From the Big Bang. Everything came into being from an explosion that has been expanding for 14m years. There's no real quick way to describe it to be honest.
http://www.bbc.co.uk/schools/gcsebit...bangrev1.shtml

Where did the matter come from to cause the Big Bang?

[Hibrandenburg]

Started as one single atom that contained all the matter that we now have in the universe. If you've got Netflix I suggest you watch the 13 episode series "Cosmos". I watched it recently and found it fascinating, I'm now watching it again with my 8 year old and he loves it.

[Hibby Bairn]

You know the next question 😎

Where did that first 'single atom' come from?

[lord bunberry]

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You know the next question 😎

Where did that first 'single atom' come from?

It came from nothing.

[Hibby Bairn]

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It came from nothing.

😳 What? Just appeared one day?

[Hibee87]

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You know the next question 😎

Where did that first 'single atom' come from?

I had a nearly identical convo with a believer in God that I worked with. She said everything must come from somthing, so my belif in the big bang et all she genuinely finds laughable. How can something become from nothing was her argument.
When I said ok then, who create God? her answer was god is all powerful and created himself I can see her logic.

[Jay]

Im going to see professor Brian Cox in a couple of months. I love all this stuff, struggle to understand a lot of it though. The recent stargazing live was interesting.

[lord bunberry]

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😳 What? Just appeared one day?

It is proposed that it came from quantum fluctuations

https://medium.com/the-physics-arxiv-blog/a-mathematical-proof-that-the-universe-could-have-formed-spontaneously-from-nothing-ed7ed0f304a3

[sleeping giant]

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Started as one single atom that contained all the matter that we now have in the universe. If you've got Netflix I suggest you watch the 13 episode series "Cosmos". I watched it recently and found it fascinating, I'm now watching it again with my 8 year old and he loves it.

Can an atom have another atom inside it ?

[lord bunberry]

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Can an atom have another atom inside it ?

It's not an atom as such. The Big Bang was referred to as the primordial or primeval atom.

[Jack]

It's complicated.

Maybe a tale from folk lore could explain it better.

[sleeping giant]

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It's not an atom as such. The Big Bang was referred to as the primordial or primeval atom.

I just don't buy it :


I have been trying to reply to this for ages but keep deleting my post as it doesn't even make sense to me :-)

If we are expanding , we will eventually contract back to where it all began .
Will it happen again and again and again ?

[TRC]

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I just don't buy it :


I have been trying to reply to this for ages but keep deleting my post as it doesn't even make sense to me :-)

If we are expanding , we will eventually contract back to where it all began .
Will it happen again and again and again ?

Maybe it already has.
Love reading the dark matter stuff. Can't remember where now but they are coming to the end of a 5 year study. which they say has new findings but they want to correlate all the data before realising. sure it's this year they have said the study is coming out.

[Jack]

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I just don't buy it :


I have been trying to reply to this for ages but keep deleting my post as it doesn't even make sense to me :-)

If we are expanding , we will eventually contract back to where it all began .
Will it happen again and again and again ?

We're OK for next season and probably the one after.

[lord bunberry]

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I just don't buy it :


I have been trying to reply to this for ages but keep deleting my post as it doesn't even make sense to me :-)

If we are expanding , we will eventually contract back to where it all began .
Will it happen again and again and again ?

There is a theory known as the Big Crunch that says the universe will get to a certain point then briefly stall before contracting back to a singularly again. This is the theory that has always made most sense to me as it allows for a new universe to be born again and again. Apparently this isn't what will happen though, it's thought that the universe will just continue to expand and eventually it will run out of fuel to make more stars and the current stars will eventually die leaving only black holes, this is known as the big freeze.
Thats my understanding of what's going to happen, but obviously I have a limited understanding of these things

[Jack]

Is the universe expanding in 2D, 3D or even 4 or beyond D?






Is D something beyond our limited dimensional thinking?




Are we a universe inside another universe inside a universe like a Russian doll?

Or is our universe a speck of dust floating in the air of a planet in a solar system in a universe.

Or ...