Can you sent data to other planets by using a laser to code the data and have a receiver on the other planet ? Is laser-technology for transmitting data to far away planets more precise than radio-waves...
130631
you would have to keep a visual line.. but yea that would work i guess
6628
Solar Sails are a very interesting technology that could be used for future space exploration, but currently face serious engineering issues to be able to do this.  \n\nFuture manned and robotic space exploration outside of our solar system could currently be considered a pipe dream.  Solar Sails, along with fusion motors, Bussard ramjets, antimatter drives, and Von Neumann machines are the various technologies being research as possible ways to further our manned and robotic exploration of space outside of our own solar system.\n\nAs far as the speed for a Solar Sail, most Solar Sail proposals would provide thrust for the craft with a very large laser. The actual speed of the craft would depend on the size of the craft and the size of the laser used, and the amount of time the laser would be able to provide thrust for the craft.
526730
They send a radio frequency.  Max distance depends on circuit design, battery strength, intervening obstacles, and so on.  Anywhere from 15 to 30 feet.
645292
microwave are the same as radio waves \nsatellite are when you transmit to a satalite \nradio waves are basicly any sound. \nlaser is energy in the form of light, \noptical fiber is used for telephones which transport light instead of radio waves, which is much faster\ninfared it think is just a laser used to transfer data
261163
Yes!\n\nAs it turns out, radio waves are nothing more\nthan the propagation of electrical and magnetic\nfields through space--the E & M fields perform\nan intricate dance around each other and fly\nthrough space.  So yes, you can transmit\nenergy through the air and "catch it" with\na receiver antenna. That's exactly\nwhat a microwave oven does:  the business\nend of a microwave is a transmitter and antenna,\nand the food is the receiver.\n\nI suspect the energy needed to propel\na car-sized vehicle, however, would involve \ndangerous amounts of power.  Any bird, pet,\nor human which passed between transmitter and\nvehicle would be zapped.  Streets\nwould be littered with smoking corpses, and\nyou'd smell BBQ all day.\n\nBut hey, BBQ ain't a bad thing!
614465
Every measurement has an uncertainty.  Measuring distance with a laser for example is affected by the wavelength of the laser which can be changed by air density.   Temperature affects the length of all materials.  Even outer space has distortions due to gravity of the stars and planets, gas clouds etc.
332109
It is impossible to give the simple answer for which you seem to be searching.\n\nThere are many frequencies which could be used to cover that distance.\n\nI recommend you read about radio communication in general and about h.f., v.h.f. and u.h.f. communications in particular.
523551
i want to make a system that gets mounter to the passenger front bumber of my car, so when im stuck in traffic and some _hole feel he deserves to drive in the emergency lane, the laser will burst a hole in his tire, and give him a reason to be in the emergency lane.  Some issues with this system is the timing of when to fire the laser, how much power the laser would be.  You dont want to accidentally fire at the wrong thing, so these issues must be addressed first.  I think thats pretty innovative.\n\nwhilst working on my M.E. senior design project, my sponsor (an artist) wanted to make a dynamic hologram depicting a full COLOR rainbow..  Yeah, I know...  It made for great jokes the entire year.
561081
There is a little research and some guy even wrote a book claiming that teleportation is feasible.  But don't buy your home teleportation machine yet.  As yet the only thing that has been transported is a few laser beams.
94424
No. There were "probes" some of which could be considered "robotic", sent to the moon, however none of them are functioning, and at least one robot, sent by USSR, crash landed. There are European probes, and Japanese probes, that are supposed to be sent, but don't believe it till you see it. Out of the things sent to the moon, one thing still functioning, is a mirror left behind, which is used to bounce a laser off of, and gives an exact measurement of the distance between the earth and the moon.
102633
Yes there is. Gravitational waves are much like shockwaves and they travel through space. They can be formed by the collision of black holes, the collision of neutron stars, etc. (All macro collisions really, but we only have a hope of detecting the really, really big ones at the moment). We have structures designed to detect these waves. What gravitational waves do is actually contract spacetime in one direction and stretch it in another. So what people have done is build long tubes that contain a laser beam in at least two directions. When the gravity wave passes through, the laser beam gets stretched along one direction and contracted in another and the frequency change from the beam registers in a detector.\n\nThere is also a chance that space acts somewhat like a fluid (like ether) but I never read that whole article so I can't say much about that yet.\n\nShockwaves as we know them that travel through rock and air don't travel through space because there is not enough matter to transmit the underpressure and overpressure. You need actual atoms to collide with each other to transmit those waves and the matter in space is not dense enough to do that.
44179
The signal strength from any space missions is very tiny compared to the background radio noise of the universe.  The smallest antenna used by NASA to pickup signals from its missions is 85' in diameter. Even this is often not enough and the antennas are used in arrays to improve signal reception.\n\nIt is highly unlikely that you would be able to pick up any signals from a deep space mission with any amateur equipment.
576034
Sounds like you are on to something here, although with respect to the size of it, and if you are thinking that it will shadow earth to some degree and reduce the direct sunlight upon the earth and create energy at the same time which could be sent to earth by microwave then in theory it would be wonderful, although I believe you would have to design it in such a way, or by using special materials that the solar winds, solar storms, meteorites, and space junk would not destroy it.\n\nAlso depending upon the distance you place it from earth, and with respect to the diameter of the object then gravitational attraction will increase so you will have to maintain its orbit using thrusters and Ion pulse would be perfect for such a power plant.\n\nAlthough the down side is that the further the distance from earth the more massive the object must be to cast the shadow, and the materials involved in such an object would cost trillions upon trillions upon trillions of dollars unless you were capable of making it tissue paper thin.\n\nAdditional details\n\nHow about producing a vast number of multiple power plants connected to very large solar sheets and pepper them at multiple distances from earth, and multiple distances apart, however between earth and the sun. this would be much more cost affective and would be perfect for filtering out the sunlight, as with respect to us we would not even be capable of observing them,  but with respect to the filtration which would be offered it would be most effective.\n\nWith respect to the energy created you could send it to any receiver which you wish to send it by microwave.
599796
You seem to looking for very precice and specific information where the slightest misunderstanding in communication could be an expensive and time consuming mistake. As this is your first antenna built, much of the experience has been played by ear i'm sure, asking advice in places like this.\n\nAbout an hour ago, my sister asked what I'm doing and I said I'm answering questions. As a scientist, she caught on to the fact that anyone could say anything, regardless of the accuracy of the advice, and be trusted. \n\nGiven that your after accurate specifics, I'd suggest you contact a group or discussion panel that specialises in antennas for radio astronomy, and ask the people that acutally know what they are talking about.
435250
Planets and stars can both twinkle, its called astronomical scintillation.  In short it is caused by fluctuation in air density and temperature.  Since stars and light both send light to earth (planets reflect a stars light whereas the star produces it's own) the twinkling effect can be seen in either.  And thus if you were standing on another planet, it IS possible that earth would appear to twinkle.  It's not guarenteed, but if the light coming from earth passed through some varying densities and temperatures it could appear to twinkle.  Refer to this article for more on "twinkling":\n\nhttp://en.wikipedia.org/wiki/Scintillation_%28astronomy%29
376656
Dear Sir:\n\nWhile there have been some actual transmissions from Earth to the Solar System seeking echos, and some of this might still be going on in a coordinated fashion, as I understand it, the primary mission of the existing radio telescopes is to "Listen" to upper wavelength radio emissions from gas clouds, and other phenomina in the universe. Of course, once some interesting\nradio emissions are detected, a full spectrum scan of the target is most likely conducted to determine the full extent of radio\nsignals from that source.\n\nOther radio transmissions are made from Earth to our traveling Space Probes and Robotic Explorers at various locations in the Universe. A continual litany of telemetry, television and voice signals also flows between the Space Station and Ground Control Center to keep a constant watch on the health, status, and activities of the space crew, mission, and the station itself.\n\nI will defer to someone from one of those positions for an\nanswer as to the power and frequency of transmissions from Earth to the Space Station, Earth to the Robot Explorers, and Earth to the existing Space Probes way out in deep space.\nMy guess is that these various transmissions take place on frequencies between 2,500 Mhz and 40,000 Mhz. That is a \nvery large radio spectrum. \n\nSince my response turns around your question, in that I am telling you that the biggest radio telescopes listen rather than\ntransmit, let me also tell you that the biggest radio telescopes are not simply single structures at a given location. In recent years a scheme for the linkage of two or more radio telescopes was developed. Therefor, the biggest radio telescope would be an electronic combination of the signals from most of the largest installations on Earth. A lot of work has been done in that vein in recent years. Using more than one receiving antenna provides an easy means for researchers to filter out local ground (earthbound) noise generators and radio disturbances. Signals heard at the same time by widely separated receiving antennas (and equipment) are most probably from the sighted target source (assuming both antennas are aimed at the same target). It is also interesting to know that the radio signals that are received require a vast amount of processing to be identified and detected. The processing of the radio telescope incoming signals takes a huge array of computers and some very complex software programs to yield useable data.\n\nYes, radio waves do go on forever. However, their strength at the point of interception decreases by the square of the distance from the source. So, the strength of radio waves become very, very weak as you move into distances like 100,000,000 miles.\nThe wave front would continue out like rings of water in a pond until they hit something and bounced back off of it. In that sense,\na portion of the radio wave would not go on forever, but would become a new wave moving in the oposite direction from the new source (which was the object that the wave struck). The\nrest of the wave front would continue on until it struck something, and we repeated the above scenario. The exact same thing happens to signals transmitted from a sonar transducer in the water. Those devices are used to detect the depth of the bottom of rivers/oceans (depth finder), fish in the water (fish finder), or even other vessels (sub hunting). Sonar, uses sound waves and not radio waves, but the principle is almost the same.  Sound waves radiate out. Nearby echos are strong enough to be detected with existing equipment and are plotted and displayed on information screens. Some echos are so weak coming back that the existing equipment cannot detect/plot/or display  them.\n\nRegards,\nZah
23427
Check:\nhttp://www.planet-source-code.com\nMSAccess gives a plenty of examples too.