About Frox: for nearly 10 years, Frox has been helping women look good and feel great in easy-fit, mix-and-match, and work-to-weekend with just a few pieces by helping them make the right choices when it comes to clothing and accessories.
About Frox: for nearly 10 years, Frox has been helping women look good and feel great in easy-fit, mix-and-match, and work-to-weekend with just a few pieces by helping them make the right choices when it comes to clothing and accessories.
So... That would make it the equivalent of a giant snowglobe.
A snowglobe that's essentially empty maybe.
According to scientific theory, the big bang didn't just create all the matter in the universe, it actually created the universe itself. Dimensions (including time) didn't exist before then. Since nothing moves faster than the speed of light, those dimensions have been expanding (at the speed of light) since then to create a sphere. The universe is a sphere with a radius of 13.75 billion lightyears.
Unfortunately we can't see the whole thing though, which is what's meant by the observable universe in that app. The dimensions are expanding outwards, but it's not like new space is being created, space is actually being stretched. What this means is that light travelling a really really long way gets stretched out (to a longer wavelength) by the time it reaches us. That's called a redshift since red light has a longer wavelength than other visible light. If a light source is sufficiently far away, there is so much space between us getting stretched that that light will never reach us. That's why we can't see anything beyond our own "observable universe" sphere.
According to scientific theory, the big bang didn't just create all the matter in the universe, it actually created the universe itself. Dimensions (including time) didn't exist before then. Since nothing moves faster than the speed of light, those dimensions have been expanding (at the speed of light) since then to create a sphere. The universe is a sphere with a radius of 13.75 billion lightyears.
Unfortunately we can't see the whole thing though, which is what's meant by the observable universe in that app. The dimensions are expanding outwards, but it's not like new space is being created, space is actually being stretched. What this means is that light travelling a really really long way gets stretched out (to a longer wavelength) by the time it reaches us. That's called a redshift since red light has a longer wavelength than other visible light. If a light source is sufficiently far away, there is so much space between us getting stretched that that light will never reach us. That's why we can't see anything beyond our own "observable universe" sphere.
I love this stuff.
I would like to correct some of those statements. The universe has an age of ~14 billion years, but the observable size is much larger than 14 billion light years. The current radius of our observable universe is ~46 billion light years, more than 3 times larger. This is because during the inflation period, the fabric of space was stretching at vastly larger speeds than the speed of light.Oh, and observable in this case means that light emitted from those objects could have reached us by today. There's a larger radius which limits what we will ever be able to see, due to regions past that limit accelerating away from us at faster than the speed of light.
Source: I'm an astrophysicist
Private Mod Note
():
Rollback Post to RevisionRollBack
Original quote byTacosnape "All ideas that give me knowledge without any effort involved on my part are good ideas. Chop chop, my dear fellow."
DCI L2 Judge GP:Madrid 2010 45th GP:Amsterdam 2011 74th GP:London 2013 67th Bazaar of Moxen 2013 32nd
fun fact they're trying to pinpoint their findings on a possibly loose cable, instead of having to rethink modern physics as we know it. truth is they've been spending a ludicrous amount of time trying to prove their results are wrong, and have invited the entire scientific community to try and come up with answers as to why on earth this is even possible. I feel that this whole 'loose cable' story is simply an excuse to fire it up again.
fun fact they're trying to pinpoint their findings on a possibly loose cable, instead of having to rethink modern physics as we know it. truth is they've been spending a ludicrous amount of time trying to prove their results are wrong, and have invited the entire scientific community to try and come up with answers as to why on earth this is even possible. I feel that this whole 'loose cable' story is simply an excuse to fire it up again.
science likes to test things a lot.
That's the thing though, they are testing all possible loose ends before having to reinvent most of the modern physics. That's why it was such a significant result, causing most of the physics community to think about the implications. And even if the loose cable story turns out to be untrue, the experiment has to be repeated by 2 other laboratories, with identical/similar results before they can be approved as not a fluke. As the saying goes, extraordinary claims require extraordinary evidence.
So far, neutrinos still travel at the speed of less than c. There's a bunch of other explanations resulting in them arriving faster than light, but not involving travelling faster than light, for example, sterile neutrinos.
Private Mod Note
():
Rollback Post to RevisionRollBack
Original quote byTacosnape "All ideas that give me knowledge without any effort involved on my part are good ideas. Chop chop, my dear fellow."
DCI L2 Judge GP:Madrid 2010 45th GP:Amsterdam 2011 74th GP:London 2013 67th Bazaar of Moxen 2013 32nd
I would like to correct some of those statements. The universe has an age of ~14 billion years, but the observable size is much larger than 14 billion light years. The current radius of our observable universe is ~46 billion light years, more than 3 times larger. This is because during the inflation period, the fabric of space was stretching at vastly larger speeds than the speed of light.Oh, and observable in this case means that light emitted from those objects could have reached us by today. There's a larger radius which limits what we will ever be able to see, due to regions past that limit accelerating away from us at faster than the speed of light.
Source: I'm an astrophysicist
That's very interesting. Thanks for the correction. I'm just an armchair physicist, so I guess I have some reading to do. I've already found that "distances obtained as the speed of light multiplied by a cosmological time interval have no direct physical significance" on Wikipedia (thanks to Hubble's Law). Quite strange.
Just a note though, you say there are some regions "accelerating away from us at faster than the speed of light", but doesn't relativity make this impossible? Even if I'm going 0.8c to the left, and you're going 0.8c to the right, when I look at you you're not going 1.6c away from me (relative to myself). I've always found that stuff confusing, so maybe I'm way off base here.
What you have to remember is that only the spread information is limited by the speed of light. The expansion of space time is not limited by this, as it's not really a physical object moving to the left or something.
Private Mod Note
():
Rollback Post to RevisionRollBack
Original quote byTacosnape "All ideas that give me knowledge without any effort involved on my part are good ideas. Chop chop, my dear fellow."
DCI L2 Judge GP:Madrid 2010 45th GP:Amsterdam 2011 74th GP:London 2013 67th Bazaar of Moxen 2013 32nd
Great thread Stardust. Thanks a lot for this. It made my day at work a little less uninteresting and people keep coming up to me and asking me what I am doing.
In summation.....Star Trek wins a prolonged naval battle against superior, yet less technologically advanced, numbers, with Picard leading the assault, while Kirk takes your soul by laying out Solo and probably his manservant Chewy as well, before impregnating and ditching your Princess.
I'm taking basic Physics (for non majors) this year, and I find it impressive. I took it last year but I failed because I stopped attending. So, I have to sit through all the bad lectures and all the bad jokes...again.
But now that I'm actually applying the knowledge, it makes a little more sense to me.
I am far from a physicist, and have no college degree, but I love reading this stuff, because as School House Rocks says, knowledge is power! But I don't understand how if neutrinos end up being faster than light, will it change how we look at things in todays world. Wouldn't it just open up things for you science guys to give us things like time travel? lol. Or would this discovery not effect the everyday man, but just the physics community?
And great find. I must do more research on some of those nebulas...like The Pillars of Creation. lol
Click here to be amazed!
(Click to enter the Frox Experience)
About Frox: for nearly 10 years, Frox has been helping women look good and feel great in easy-fit, mix-and-match, and work-to-weekend with just a few pieces by helping them make the right choices when it comes to clothing and accessories.
▲
▲ ▲
Not quite infinite, just very very VERY big.
You're welcome!
(Click to enter the Frox Experience)
About Frox: for nearly 10 years, Frox has been helping women look good and feel great in easy-fit, mix-and-match, and work-to-weekend with just a few pieces by helping them make the right choices when it comes to clothing and accessories.
Very cool. My favorite line was "distances shorter than this are unconfirmed."
That threw me for a loop.
A snowglobe that's essentially empty maybe.
According to scientific theory, the big bang didn't just create all the matter in the universe, it actually created the universe itself. Dimensions (including time) didn't exist before then. Since nothing moves faster than the speed of light, those dimensions have been expanding (at the speed of light) since then to create a sphere. The universe is a sphere with a radius of 13.75 billion lightyears.
Unfortunately we can't see the whole thing though, which is what's meant by the observable universe in that app. The dimensions are expanding outwards, but it's not like new space is being created, space is actually being stretched. What this means is that light travelling a really really long way gets stretched out (to a longer wavelength) by the time it reaches us. That's called a redshift since red light has a longer wavelength than other visible light. If a light source is sufficiently far away, there is so much space between us getting stretched that that light will never reach us. That's why we can't see anything beyond our own "observable universe" sphere.
I love this stuff.
Thanks for that.
RRR Buy some of my art! Prints! RRR
I would like to correct some of those statements. The universe has an age of ~14 billion years, but the observable size is much larger than 14 billion light years. The current radius of our observable universe is ~46 billion light years, more than 3 times larger. This is because during the inflation period, the fabric of space was stretching at vastly larger speeds than the speed of light.Oh, and observable in this case means that light emitted from those objects could have reached us by today. There's a larger radius which limits what we will ever be able to see, due to regions past that limit accelerating away from us at faster than the speed of light.
Source: I'm an astrophysicist
DCI L2 Judge
GP:Madrid 2010 45th
GP:Amsterdam 2011 74th
GP:London 2013 67th
Bazaar of Moxen 2013 32nd
Powers of Ten, an old documentary film that does the same thing as the link in the OP.
Height, an XKCD comic that accurately shows the scale of the known universe.
"I've always been a fan of reality by popular vote" - Stephen Colbert (in response to Don McLeroy)
GPolukranos, Kill ALL the Things!G
Fun fact: no they don't.
http://en.wikipedia.org/wiki/Total_Perspective_Vortex#Total_Perspective_Vortex
fun fact they're trying to pinpoint their findings on a possibly loose cable, instead of having to rethink modern physics as we know it. truth is they've been spending a ludicrous amount of time trying to prove their results are wrong, and have invited the entire scientific community to try and come up with answers as to why on earth this is even possible. I feel that this whole 'loose cable' story is simply an excuse to fire it up again.
science likes to test things a lot.
http://www.youtube.com/watch?v=rUJzYSswcj0
"Sometimes, the situation is outracing a threat, sometimes it's ignoring it, and sometimes it involves sideboarding in 4x Hope//Pray." --Doug Linn
That's the thing though, they are testing all possible loose ends before having to reinvent most of the modern physics. That's why it was such a significant result, causing most of the physics community to think about the implications. And even if the loose cable story turns out to be untrue, the experiment has to be repeated by 2 other laboratories, with identical/similar results before they can be approved as not a fluke. As the saying goes, extraordinary claims require extraordinary evidence.
So far, neutrinos still travel at the speed of less than c. There's a bunch of other explanations resulting in them arriving faster than light, but not involving travelling faster than light, for example, sterile neutrinos.
DCI L2 Judge
GP:Madrid 2010 45th
GP:Amsterdam 2011 74th
GP:London 2013 67th
Bazaar of Moxen 2013 32nd
That's very interesting. Thanks for the correction. I'm just an armchair physicist, so I guess I have some reading to do. I've already found that "distances obtained as the speed of light multiplied by a cosmological time interval have no direct physical significance" on Wikipedia (thanks to Hubble's Law). Quite strange.
Just a note though, you say there are some regions "accelerating away from us at faster than the speed of light", but doesn't relativity make this impossible? Even if I'm going 0.8c to the left, and you're going 0.8c to the right, when I look at you you're not going 1.6c away from me (relative to myself). I've always found that stuff confusing, so maybe I'm way off base here.
DCI L2 Judge
GP:Madrid 2010 45th
GP:Amsterdam 2011 74th
GP:London 2013 67th
Bazaar of Moxen 2013 32nd
Explaining the 10th dimension.
Also ROFL at "Source: I am an astrophysicist"
But now that I'm actually applying the knowledge, it makes a little more sense to me.
Thanks for the link (adequately named), Stardust.
You would do well to know that this gentleman is a musician and his book has no root in physics or math at all.
Well that rules.
And great find. I must do more research on some of those nebulas...like The Pillars of Creation. lol