zod said:Sector 2312 can't be anywhere near the Milky Way in a universe that has over a million galaxies.
That's if there is no signal that can travel faster than light. We don't know that for sure.JeffMackwood said:(Imagine that we were lucky enough to detect a signal from a location only 5,000 light years away from Earth. That's within the Milky Way and very close to us, galaxy-wise. If we were to send a signal to them, and assuming they responded as soon as they received it, it would take 10,000 years to hear back from them. That's about the total number of years since the beginning of the Neolithic Age (which is essentially the start of civilization - depending on how you define it). Any chance there would be anyone around either interested in, or capable of, receiving the reply?)
Heck, I can't even play back my 10-year old floppy disks... :?JeffMackwood said:Any chance there would be anyone around either interested in, or capable of, receiving the reply?
The electro-magnetic spectrum is a small part of the universe. We sure don't know much about gravity.DIYer said:That's if there is no signal that can travel faster than light. We don't know that for sure.JeffMackwood said:(Imagine that we were lucky enough to detect a signal from a location only 5,000 light years away from Earth. That's within the Milky Way and very close to us, galaxy-wise. If we were to send a signal to them, and assuming they responded as soon as they received it, it would take 10,000 years to hear back from them. That's about the total number of years since the beginning of the Neolithic Age (which is essentially the start of civilization - depending on how you define it). Any chance there would be anyone around either interested in, or capable of, receiving the reply?)
zod said:The electro-magnetic spectrum is a small part of the universe. We sure don't know much about gravity.DIYer said:That's if there is no signal that can travel faster than light. We don't know that for sure.JeffMackwood said:(Imagine that we were lucky enough to detect a signal from a location only 5,000 light years away from Earth. That's within the Milky Way and very close to us, galaxy-wise. If we were to send a signal to them, and assuming they responded as soon as they received it, it would take 10,000 years to hear back from them. That's about the total number of years since the beginning of the Neolithic Age (which is essentially the start of civilization - depending on how you define it). Any chance there would be anyone around either interested in, or capable of, receiving the reply?)
Then there is the little jewel that the galaxies that are are farthest away appear to be moving faster than the speed of light away from us.
Last shuttle launch tomorrow at 10 EDT, weather permitting.
Jeff,JeffMackwood said:Zod,
We know everything about gravity - by far the weakest of the "four forces."
Jeff
I don't know the details of the theory but while watching Star Trek years ago, I heard a term "subspace transmission". Many things we use today were only imaginations couple hundred years ago so I wouldn't rule out the possibility.JeffMackwood said:DIYer,
I partially agree, but in the case of my original statement (the ability to communicate) I disagree. I'll explain.
It has been demonstrated that if an electron pair is separated, changes to one electron will be instantaneously felt by the other. This is known as "quantum entanglement." It has been performed experimentally. So yes a "signal" of some sort could travel faster than the speed of light. But (and this is just an example to illustrate a point) you would first need to prepare a source of electron pairs, separate them, and then transport (at far far less than the speed of light) them to whoever (or whatever) you wished to communicate with. Would be like you having a pair of walky talkies set to communicate only with each other. You'd need to share one for them to be of any use.
Botch said:Heck, I can't even play back my 10-year old floppy disks... :?
But someone else can play it and I'm sure it's not hard to find one (quite possibly wearing thick glasses and carries a calculator in the shirt pocket) near by.I think that Botch "got" my point.
That's if there is no signal that can travel faster than light. We don't know that for sure.[/quote]JeffMackwood said:(Imagine that we were lucky enough to detect a signal from a location only 5,000 light years away from Earth. That's within the Milky Way and very close to us, galaxy-wise. If we were to send a signal to them, and assuming they responded as soon as they received it, it would take 10,000 years to hear back from them. That's about the total number of years since the beginning of the Neolithic Age (which is essentially the start of civilization - depending on how you define it). Any chance there would be anyone around either interested in, or capable of, receiving the reply?)
DIYer said:Guys, just a reminder, please preview before posting especially when quoting someone, cuz it can be very confusing if not quoted right. Thanks.
Huey said:.....Is Michio Kaku the japanese guy that is on a lot of science shows? If he is the same guy I am thinking of, I lost a little respect for him when he stated that "rocket" off the coast of California last year was a jet. Might not be the guy I'm thinking of though.