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- Jun 5, 2014
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Which lab? What data?
Sandia national labs. Pretty cool place, but I can't really talk about the data.
Which lab? What data?
Sorry, sometimes my sarcasm doesnt get through to people
Aren't all the photons emitted (from the big bang) on the edge of the universe heading away from us?
That's what I'm getting at. Photons are massless and thus MUST travel at the speed of light, while Earth has mass and CANNOT travel at the speed of light (thank Einstien and special relativity math for that). If the assumption here is that they all started at the same point, how did we creatures of mass catch up with those speedy photons?
Sandia national labs. Pretty cool place, but I can't really talk about the data.
Emphasis mine; it isn't.
The Big Bang isn't a gigantic explosion at a single point in space and time, but rather the creation of an entire space-time. The space created is either infinite, or finite but without any edge (curved back on itself). In either case, an observer at any point P in that Universe's space, and at any time T in that Universe's history, can intercept exactly and exclusively those Big Bang photons that were created at any point T light-years* away and that happened to be launched towards P at time zero**.
*Actually it isn't quite T light-years because of the dynamics of that Universe; rather, it is the distance photons have traveled in the age of that Universe.
**Actually it isn't quite time zero, but the time at which that Universe first becomes transparent to photons, which also depends on the dynamics (expansion => cooling).
Emphasis mine; it isn't.
The Big Bang isn't a gigantic explosion at a single point in space and time, but rather the creation of an entire space-time. The space created is either infinite, or finite but without any edge (curved back on itself). In either case, an observer at any point P in that Universe's space, and at any time T in that Universe's history, can intercept exactly and exclusively those Big Bang photons that were created at any point T light-years* away and that happened to be launched towards P at time zero**.
*Actually it isn't quite T light-years because of the dynamics of that Universe; rather, it is the distance photons have traveled in the age of that Universe.
**Actually it isn't quite time zero, but the time at which that Universe first becomes transparent to photons, which also depends on the dynamics (expansion => cooling).
i surf the internet and post on forums.
Emphasis mine; it isn't.
The Big Bang isn't a gigantic explosion at a single point in space and time, but rather the creation of an entire space-time. The space created is either infinite, or finite but without any edge (curved back on itself). In either case, an observer at any point P in that Universe's space, and at any time T in that Universe's history, can intercept exactly and exclusively those Big Bang photons that were created at any point T light-years* away and that happened to be launched towards P at time zero**.
*Actually it isn't quite T light-years because of the dynamics of that Universe; rather, it is the distance photons have traveled in the age of that Universe.
**Actually it isn't quite time zero, but the time at which that Universe first becomes transparent to photons, which also depends on the dynamics (expansion => cooling).
I figured it would end like this. I guess we'll have to just agree to disagree.
Haha, J/K! I knew eventually I'd have to accept that my traditional education left me hopelessly bound to Newtonian physics. Expanding universe is one thing, expanding space/time is another. The last chapter in my Univ physics book covered Lorentzian transformations, upsetting the stable world I though I knew. It was like the last book of the bible covering atheism.
I'm a software developer that works on software to program smart cards. All those fancy new credit cards you're getting with the chips in them? Not that new, I've been doing this for 15 years.
I'm an electronics engineer or more specifically and embedded systems engineer, which means I design things that have computers in them. I design the analog and digital circuit and then write the firmware that drives the hardware.
I did that for the last 18 years for HID. iClass, Mifare, DESFire etc.
So which branch of the Federal Government do you work for?
That's what I'm getting at. Photons are massless and thus MUST travel at the speed of light, while Earth has mass and CANNOT travel at the speed of light (thank Einstien and special relativity math for that). If the assumption here is that they all started at the same point, how did we creatures of mass catch up with those speedy photons?
Well its more like: the Galaxies aren't moving, but the fabric of space-time is stretching outward, ...take a balloon and blow it up just a little. Then add random dots on the surface of the balloon, which represent the galaxies. Then start blowing the balloon up. The surface represents the expansion of the universe. As you will note that the galaxies appear to be moving away from each other as you increase the surface area of the balloon. Simple, yes?
Well its more like: the Galaxies aren't moving, but the fabric of space-time is stretching outward, which creates more space-time between the galaxies. For example lets create a 2-dimensional metaphor of the multi-dimensional universe; take a balloon and blow it up just a little. Then add random dots on the surface of the balloon, which represent the galaxies. Then start blowing the balloon up. The surface represents the expansion of the universe. As you will note that the galaxies appear to be moving away from each other as you increase the surface area of the balloon. Simple, yes?
Edit: So the balloon represents a 2-dimensional surface closed back on itself. So in thoery if you took off into space from the north pole in a straight line outward you would eventually come back to the south pole.
Well, the dots on your balloon are actually moving away from each other, and they are moving in space as well. Take a string and measure the distance between two dots when the balloon is partially inflated. blow it up and measure again. they have moved apart.
Another previous job I had. Independent security consultant for museums. Designing access control, cctv, and alarm systems for museums around the country. Tons of fun, boss was a bit difficult, to be nice about it.
But what's outside the balloon?
United States Marine. Don't really think i need to explain much more than that.
But what's outside the balloon? Yes, I see. But I don't like it one bit. Reminds me of a book I read a long time ago called Flatlands. The travels of a 3-dimensional creature in a 2 dimensional world, and the new perspective it gives, and the difficulty for the 3D guy to explain to the 2D creatures what a third dimension would look like.
Anyway, this stuff is not intuitive, but I guess it's the only way to make the math of the universe work. I'm going to rinse it out of my brain tonight with beer (I listen to a podcast all the time called Startalk, Neil deGrasse Tyson, so I can't escape it for long).
It's important to have a job that makes a difference, boys. That's why I manually masturbate caged animals for artificial insemination.
United States Marine. Don't really think i need to explain much more than that.
Nice to see at least one other person involved in animal husbandry.
I'm a farrier.
I clean, knife, and trim horses feet to balance their movement. Heat either a premade shoe, or straight stock, and shape it to fit the trimmed foot. Then (after cooling) I nail it on, set clinches, and make it purty for the client. I know as much, (sometimes more) about the distal equine limb as the vets do. I am able to speak to the vets in doctor-ese, as well as simplifying things for the non-medically trained clients so they can understand the three page printout that the vet gave them.
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