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#1
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using the sun and shade(s) - - to send morse code messages across the galaxy
Just an idea I had - - - using the sun and shade(s) - - to send morse
code messages across the galaxy. Any thoughts anyone? Perhaps use clouds of dust. Maybe there is an electro-chemical way to turn opaque a cloud of dust, and repeatedly do so. The closer the shade to the sun the more stars the message goes to - - but the closer to the sun the more intense the sunlight that must be blocked is. Using the sun eliminates the need to use massive lasers, radios, etc., so maybe it's the only way to go. |
#2
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using the sun and shade(s) - - to send morse code messages across the galaxy
I suppose astonomers have already looked for signaling like this, if
not, they should. Due to low data bandwith it would take long time to communicate, which might be best so as to slow rate of revolution in technologies to avoid massive economic disruption - - sounds like a good sci-fi theory or book. |
#4
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using the sun and shade(s) - - to send morse code messages across the galaxy
In article ,
Alex William Russell wrote: Using the sun eliminates the need to use massive lasers, radios, etc., so maybe it's the only way to go. You don't actually need that huge a laser for interstellar communications, as it turns out. The low beam divergence greatly increases the effective power, and the extremely narrow band makes detection a lot easier. -- MOST launched 1015 EDT 30 June, separated 1046, | Henry Spencer first ground-station pass 1651, all nominal! | |
#5
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using the sun and shade(s) - - to send morse code messages acrossthe galaxy
Alex William Russell wrote:
Just an idea I had - - - using the sun and shade(s) - - to send morse code messages across the galaxy. Any thoughts anyone? Dyson said that civilizations might send just one code: an on-to-off transition, and that it would have just one message: there's a technological civilization using most (or all) of the energy of a sun here. -- Regards, Mike Combs ---------------------------------------------------------------------- We should ask, critically and with appeal to the numbers, whether the best site for a growing advancing industrial society is Earth, the Moon, Mars, some other planet, or somewhere else entirely. Surprisingly, the answer will be inescapable - the best site is "somewhere else entirely." Gerard O'Neill - "The High Frontier" |
#6
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using the sun and shade(s) - - to send morse code messages acrossthe galaxy
Mike Combs wrote:
Alex William Russell wrote: Just an idea I had - - - using the sun and shade(s) - - to send morse code messages across the galaxy. Any thoughts anyone? Dyson said that civilizations might send just one code: an on-to-off transition, and that it would have just one message: there's a technological civilization using most (or all) of the energy of a sun here. Wouldn't that be a shift of energy emmision into the IR? After all, heat can't be 100% converted into usefull work. Also, I'd expect it to be a slow transistion over years(centuries?) Still, something for astronomers to watch for. |
#7
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using the sun and shade(s) - - to send morse code messages across
Across galactic distance, you'd have to be able to put some kind of shutter
across the beam of a pulsar to modulate it, for it to have a chance of detection. |
#8
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using the sun and shade(s) - - to send morse code messages across the galaxy
"Mike Combs" wrote:
Alex William Russell wrote: Just an idea I had - - - using the sun and shade(s) - - to send morse code messages across the galaxy. Any thoughts anyone? Dyson said that civilizations might send just one code: an on-to-off transition, and that it would have just one message: there's a technological civilization using most (or all) of the energy of a sun here. Doesn't even have to be fully on/off, nor intentional. One of the interesting things about the increasingly capable low-mass planet detection systems we will be building and fielding in the next few decades is that they will also be able to detect constructed objects of various (extremely large) sizes. For example, increasingly sophisticated high-accuracy photometric surveys designed to study asteroseismology or detect planetary transits and the waxing and waning of large planets will also be able to detect similarly sized structures such as huge orbital habitats. As those and other systems grow in capability (and more of them come on line) they will be able to survey more systems for planets, they will also increase their capability and their probability of detecting constructed objects. The minimum size of detectable objects will drop, and the rate of systems surveyed will increase. Eventually, depending on the nature and abundance of technological civilizations in our galaxy, there will be a cross over point where the number of systems surveyed down to a certain "resolution" will be comparable to the abundance of detectable alien artifacts around stellar system such that the probability of detecting one such becomes very high. Of course, if alien technological civilizations are rare or if large structures are rare then the waiting time could be very long. It would certainly be interesting to be surveying a planetary system with a known Earth-like planet in it, perhaps, using a large planetary imager type system and being able to just barely see the construction of a generational star ship or some such. Very interesting indeed. |
#9
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using the sun and shade(s) - - to send morse code messages across the galaxy
using the sun and shade(s) - - to send morse
code messages across the galaxy. Any thoughts anyone? Using the sun gives one something to work with, rather than having to generate energy for a laser or radio. For maximum return on one's investment, could one dump some material to serve as a catalyst in a limited system, and either - - - 1) temporarily flare the sun on command by satisfying the need for a scarce element in the "fusion process" - - or 2) dump metals upon which sunspots might form and dim the sun - - - or 3) simply nuke the surface of the sun to stir things up to maybe elevate temporarily light output ??? |
#10
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using the sun and shade(s) - - to send morse code messages across the galaxy
Our knowledge of astro-physics is limited and not perfect of course
but is somewhat sound we think, so once we have interstellar flight should we head to the most extreme apparently natural phenomena that stretches the limits of theory, since such objects have a higher probabability of being "man-made" than objects that are well explained by our theories. So such extreme objects (be they actually energy projects, or religious or artistic acts, or weapons or war, or mineral production/gathering steps) could therefore be used like beacons of civilizations??? |
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