What is the Universe expanding into..

Do you think there was anything before the big bang?

  • I don't think there was anything before the Big Bang

    Votes: 56 12.5%
  • I think something existed before the Big Bang

    Votes: 200 44.7%
  • I don't think the big bang happened

    Votes: 54 12.1%
  • I think the universe is part of a mutiverse

    Votes: 201 45.0%

  • Total voters
    447
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What would the physical difference consist in?
For waves that propagate in a medium, such as sound waves, the velocity of the observer and of the source are relative to the medium in which the waves are transmitted. The total Doppler effect may therefore result from motion of the source, motion of the observer, or motion of the medium. Each of these effects is analyzed separately.

For waves which do not require a medium, such as light, only the relative difference in velocity between the observer and the source needs to be considered.
 
Nimrod AWR3
Bonsai, I think you mean the AEW3 - Airborne Early Warning (AEW) - the project was cancelled and Boeing E-3 Sentry aircraft were deployed instead.

I've got a model of the Nimrod MR2 (as yet unbuilt)!
 

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Bonsai, I think you mean the AEW3 - Airborne Early Warning (AEW) - the project was cancelled and Boeing E-3 Sentry aircraft were deployed instead.

I've got a model of the Nimrod MR2 (as yet unbuilt)!

Indeed.

I was reading about that a few nights back. What an unholy balls up.

Then I thought about the F35. $480 billion and counting and there are still problems.

Seems when it comes to military technology, cost overruns and failure to meet spec know bounds. That said, Nimrod really missed the mark - the plane was too small!
 
My father was English, my mother South African, my wife Dutch, my two sons a Dutch, my sister Austrian, my brother an American and my half brother and his family French.

I am a European first and British subject second.
Hope that’s clear to you and anyone else that cares to probe this issue.
 
Fair comment, Bonsai about Europe. Just that it is actually handy to know where people live when discussing new components an' all that....

Bit of speculative nonsense in the The Guardian this last month:

Scientists say most likely number of contactable alien civilisations is 36 | Alien life | The Guardian

Boffins say there are 36 types of Little Green Men in teh Milky Way. And they are 17,000 light years away on average. 😕

I am sure these people make this stuff up over a Pub Lunch.
Well, I'm glad those 36 civilizations didn't contact us, with that Covid-19 thing going on...😀
Besides it would lead to traffic jams in space.
 
Try this from a Prof. Mark Defant

YouTube

The best estimates from what I’ve seen are ‘perhaps’ 1 advanced civilization per galaxy.

Drakes Equation has been refined to include a host of factors that quickly make the odds vanishingly small.

Sy also added an interesting one. Imagine you are sitting in a darkened arena with people. It’s pitch black. Every now and then a flashlight goes off. That’s an analogy for the rise and fall intelligent life across the universe. It’s mostly dark. Every now and then, there’s a spark but that’s it.

You have to have a star that is just the right size. A small rocky planet in the Goldilocks region and you need about 3 billion years without major disruption- no no GRB’s, no other mass extinction events, no asteroids big enough to finish things off completely. And then you need the intelligent life that arises to be not too stupid for just long enough.

The Earth is very unique, as is our home star and the solar system - none of which are typical.
 
I was fascinated today by the idea of what an Alien Dog would look like. 😕

Turns out they have already rocked up on our dishevelled Planet:

A Dingo Ate Australia

These animals ain't your best friend at all. Throw a ball once, and they'll bring it back to you. Throw it away again, and they wonder why they bothered, since you are clearly not interested! 😎

Amazing. 😀
 
They may not bring it back at all, concluding that you want it away from you.

I think the assumption by the Dingoes is that the ball is important. Just like it is to Tom Brady of the Patriots, or lately Tampa Bay.

But if Tom Brady keeps throwing it away, why chase it? Presumably he doesn't want it. You follow? 😀

Only dumb Dogs chase a ball relentlessly. Hope I explained that well.
 
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