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Signals to and from exoplanets
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Grandmaster Send message Joined: 17 Jan 13 Posts: 5 Credit: 11,516 RAC: 0 |
maybe im not the first one to think of this but why arent we sending directed radio signals toward known exoplanets or pointing our radio telescopes at star systems with exoplanets to listen for signals? seems like that would be the most likely way of finding a signal. |
rob smith Send message Joined: 7 Mar 03 Posts: 22204 Credit: 416,307,556 RAC: 380 |
We are, and have been for over 100 years. Bob Smith Member of Seti PIPPS (Pluto is a Planet Protest Society) Somewhere in the (un)known Universe? |
Michael Watson Send message Joined: 7 Feb 08 Posts: 1384 Credit: 2,098,506 RAC: 5 |
The SETI Institute is now using the Allen Telescope array to listen for signals from stars known or believed to have exo-planets. They use the lists compiled by the Kepler Space Telescope, and other exo-planet search projects. |
William Rothamel Send message Joined: 25 Oct 06 Posts: 3756 Credit: 1,999,735 RAC: 4 |
I think that, so far, we don't know of any Exoplanets that are likely to be Earth-like. Our count of planets will improve as time goes on. How far away are these, and are we likely to pick up spurious emissions at these distances ? I don't think that we are beaming any messages at the current time. |
rob smith Send message Joined: 7 Mar 03 Posts: 22204 Credit: 416,307,556 RAC: 380 |
Its over 100 years since the people of earth started to transmit radio signals around our planet. The first extra-terrestrial radio reception was a few years later, but we didn't know what it was as we didn't know how to even think about analysing it back then. Bob Smith Member of Seti PIPPS (Pluto is a Planet Protest Society) Somewhere in the (un)known Universe? |
Michael Watson Send message Joined: 7 Feb 08 Posts: 1384 Credit: 2,098,506 RAC: 5 |
I think that, so far, we don't know of any Exoplanets that are likely to be Earth-like. Our count of planets will improve as time goes on.Various exoplanet searches have detected both near and distant planets. Those in the Kepler field are typically about 300 to 3000 light years away, but this is not the only data used by the SETI Institute. The most Earth-like planet (tentatively) detected is KOI (for Kepler Object of Interest) 172.02. It is only half again as large as Earth, and within it's star's habitable zone. Even in systems where an Earth-like planet has not been detected, the presence of larger planets suggests the possibility of smaller ones, just as Jupiter might be said to suggest the possibility of Earth's existence. Detecting signals not intended for interstellar reception is worth considering for the nearer of known exoplanets. This would not be likely for planets in the Kepler field, given the receivers currently in use. Patience in listening might reveal a signal that is periodically sent our way, much as a lighthouse rotates its beam over all azimuthal angles. |
Lynn Send message Joined: 20 Nov 00 Posts: 14162 Credit: 79,603,650 RAC: 123 |
New definition of the “Goldilocks Zone†puts Earth right on the edge of habitability New one?? 'Habitable Zone' for Alien Planets, and Possibly Life, Redefined |
Grandmaster Send message Joined: 17 Jan 13 Posts: 5 Credit: 11,516 RAC: 0 |
I understand what you guys are saying but what is the reason for not sending deliberate signals to these star systems we know to have exoplanets. The only deliberate signal/message I could find information on was the Arecibo message sent in 1974. Why do we spend so much time listening and none sending? |
Bob DeWoody Send message Joined: 9 May 10 Posts: 3387 Credit: 4,182,900 RAC: 10 |
There is a sizable group of people who don't think it is a good idea to alert other possible sentient beings to our presence without first making sure they are friendly. I'm not sure how that would be done but I guess it would be safe to err on the side of caution. Besides it would cost mountains of money to transmit a signal with enough power at a specific target. Bottom line is we may be better off staying under the radar, so to speak. Bob DeWoody My motto: Never do today what you can put off until tomorrow as it may not be required. This no longer applies in light of current events. |
Grandmaster Send message Joined: 17 Jan 13 Posts: 5 Credit: 11,516 RAC: 0 |
Yeah after doing some more searching I found that there have been 24 deliberate signals sent with the first being the Arecibo message in 1974. I found the information on a Wiki page after searching for Active SETI. |
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