Recent content by PeterPendragon

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    I What is the size of the observable universe relative to CMBR

    So that's almost a different thread. When we look at Mars through a telescope we don't see "now" either. In fact we can argue we don't know anything about what is happening "now" at any distance. What are you up to? :)
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    I What is the size of the observable universe relative to CMBR

    Wow, what an excellent answer phinds. That really made me have a light bulb go off. I think I get it. Thanks!
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    I What is the size of the observable universe relative to CMBR

    Hi. I knew all this and had read about the Surface of Last Scattering. What I don't understand is where the article talks about galaxies beyond the observation sphere. Are there galaxies beyond the CMBR? How can that be? Thanks for explaining to a Biologist!
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    I What is the size of the observable universe relative to CMBR

    Reading the Wikipedia article makes my head spin! Somehow the figure https://en.m.wikipedia.org/wiki/File:Observable_universe_logarithmic_illustration.png doesn't seem quite right. I don't understand how the CMBR doesn't define the edge of the universe. If we can see the CMBR that happened near...
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    B What is "space"?

    Hi Peter. I have a PhD. While you say my statements are incorrect, you don't say why. Just that they are vague. Let me try again. I often hear that the Big Bang created Space. Did it create it or occur in it? If there could be multiple big bangs creating multiverses, what is between them?
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    B What is "space"?

    Hi. This may seem a straightforward question, but I'm not sure given some of the threads about expansion, infinite universes, and multiverses. How about I make a statement, and you folks shoot it down? Space is nothing. It is the absence of all particles and energy. It is infinite and timeless...
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    B Spooky action communication

    Yeah, I used to work at NASA. You've seen the mermaid, human head, rat etc we've found on Mars!
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    B Spooky action communication

    Thanks all, especially mfb and Nugatory who really got me to understand. Okay, so maybe not for this forum, but why this, I think, common misconception about faster than light communication?
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    B Spooky action communication

    Okay, all this is great, I appreciate all the answers. Using mfb's paper analogy, it seems that since there are only two possibilities, of course when you open one, the other is the opposite. And, why can't you "change it anymore"? I thought the whole point was that if you changed the state of a...
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    B Spooky action communication

    Thanks. I get that, but I thought if you altered the state of one pair (eg spin), you changed the other, hence communication?
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    B Spooky action communication

    If entangled pairs can be used to communicate instantaneously, does that mean one of the paired particles has to be physically delivered to the reception point in order to establish communication?
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