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Planet Hunters Report Record-Breaking Discovery, Search for other habitable planets
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KLiK Send message Joined: 31 Mar 14 Posts: 1304 Credit: 22,994,597 RAC: 60 |
so far noone has been calculating how far the signals from Earth would go to Space...as the emitters got more and more powerful from 1890 on... Yes...and most of the DATA goes underground to cables... :/ We might think of ourselves as advanced...having short range BT & WiFi...but can some ET hear us? How come nobody thought about comare signal from Earth against backround noise...and see how far can Earth be detected... ;) non-profit org. Play4Life in Zagreb, Croatia, EU |
KLiK Send message Joined: 31 Mar 14 Posts: 1304 Credit: 22,994,597 RAC: 60 |
Nice...so back to SETI - how do we think we can detect some signal from outher space, houndreds or even millions of ly away? :/ non-profit org. Play4Life in Zagreb, Croatia, EU |
William Rothamel Send message Joined: 25 Oct 06 Posts: 3756 Credit: 1,999,735 RAC: 4 |
how do we think we can detect some signal from outher space Many of us believe, since we have been listening for 50 years now, that only a very high powered, intentionally focused beacon (laser or microwave) type of signal could be detected. Since THEY would not know that we are here, this would likely be a slewing type of transmission and would likely not be a constant signal burt rather a one-time event. As far as I know, we are not transmitting such a message. Let's hope that: if another civilization exists, that they are not as ignorant as we are in this regard. |
Bob DeWoody Send message Joined: 9 May 10 Posts: 3387 Credit: 4,182,900 RAC: 10 |
Assuming there are space faring civilizations in our portion of the Milky Way we will most likely be found purely by chance and the same goes the other way. We might be looking for a very long time or we may make contact tomorrow. 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. |
KLiK Send message Joined: 31 Mar 14 Posts: 1304 Credit: 22,994,597 RAC: 60 |
Assuming there are space faring civilizations in our portion of the Milky Way we will most likely be found purely by chance and the same goes the other way. We might be looking for a very long time or we may make contact tomorrow. Or maybe comnbination of Arecibo with software could find even faint signal...so to rephrase question: how faint signal can we detect with this software? ;) In other words...how FAR can we "hear someone fart"? :D non-profit org. Play4Life in Zagreb, Croatia, EU |
William Rothamel Send message Joined: 25 Oct 06 Posts: 3756 Credit: 1,999,735 RAC: 4 |
Assuming that there are OTHERS to find us out there in our Galaxy and beyond; we won't be found since we are not broadcasting any powerful, focused blasts out into the cosmos. If They were close enough to pick up our radar or TV broadcasts, we would have heard them by now ourselves. I don't think that any legitimate contact would, could or should be kept secret. |
KLiK Send message Joined: 31 Mar 14 Posts: 1304 Credit: 22,994,597 RAC: 60 |
Assuming that there are OTHERS to find us out there in our Galaxy and beyond; we won't be found since we are not broadcasting any powerful, focused blasts out into the cosmos. Well, we are...talking to our probes near Jupiter, Saturn, Pluto & Mars... The question is: if we beam our data to those probes...and those are powerfull beams enough to get to those probes...so they would reach probably further than several ly (5-10ly is what radio emissions are heared)... So to what systems that lay beyond our probes did we send data? And which data? Are there any SETI candicates (that we know of) beyond our probes? How much would the signal reach if we talk to Voyager 1 or 2? Rosseta? MAVEN & the rovers on Mars? List of missions: http://science.nasa.gov/missions/ http://www.esa.int/ESA/Our_Missions , http://sci.esa.int/home/51459-missions/ ... non-profit org. Play4Life in Zagreb, Croatia, EU |
William Rothamel Send message Joined: 25 Oct 06 Posts: 3756 Credit: 1,999,735 RAC: 4 |
The Voyager space craft is only 13 billion miles from earth and will take another 300 years to reach the Oort cloud which is the outer limit of our Solar system. The nearest star system is about 4 light-years away or about 20 Trillion miles. We could probably detect TV and Radar at these distances --but for the past 50 years we haven't heard a thing as far as we know. It could also be that we did hear them but never had the smarts to decode their transmission--this is not likely in my opinion. |
KLiK Send message Joined: 31 Mar 14 Posts: 1304 Credit: 22,994,597 RAC: 60 |
Again, maybe I didn't write it correctly... As o many of us go from terrestrial signal TV to cable, most our transmission goes underground...so they (if they are also listening), might not hear us... Only transmission that we make beyond Earth are the ones we do with our probes...so if "they" pick up anything, it will be that! Of course they would have to be on the line of the Earth & probe itself... ;) non-profit org. Play4Life in Zagreb, Croatia, EU |
Larry Monske Send message Joined: 17 Sep 05 Posts: 281 Credit: 554,328 RAC: 0 |
Lets see where prioities lay. Any of these "predicted" planets arent even confirmed let alone even having an atmosphere. They are too far away to study let alone see them. We spent how much on finding exo-planets BILLIONS how many planets can be reached in 1,350,000 years travel one way. Mankind could never get there at 64,000. Now what is in place to stop/change orbit of an earth crossing asteroid , exactly nothing. Amuture astronomers find the bulk of them to all the very large scopes they are a nusence something to foil their images. Realistically we are too far from other stars and man cant endure more than 300 days in zero G.Our technology is require anothera million years or more before any attempt could feasibly be made. We will get smacked by an asteroid long before we find life on another world history shows every thousand years we get hit by something big thats assured not that it will happen but when. If you arent looking for them it increases our chances a 100 fold. |
Julie Send message Joined: 28 Oct 09 Posts: 34041 Credit: 18,883,157 RAC: 18 |
Lets see where prioities lay. Any of these "predicted" planets arent even confirmed let alone even having an atmosphere. They are too far away to study let alone see them. We spent how much on finding exo-planets BILLIONS how many planets can be reached in 1,350,000 years travel one way. Mankind could never get there at 64,000. Very clear post, thank you Larry. rOZZ Music Pictures |
Wiggo Send message Joined: 24 Jan 00 Posts: 34744 Credit: 261,360,520 RAC: 489 |
In a 1st, a "super-Earth" has been found by a ground-based telescope. http://www.news.com.au/technology/science/super-earth-alien-planet-spotted/story-fnjwlcze-1227155326111 But it's unlikely that it's habitable. Cheers. |
Lynn Send message Joined: 20 Nov 00 Posts: 14162 Credit: 79,603,650 RAC: 123 |
Astronomers find Pluto-sized objects using ALMA Harvard astronomers have found Pluto-sized objects moving around the sun. According to the published paper, these objects can be closely related with stars too. The discovery was made by using the Atacama Large Millimeter/submillimeter Array (ALMA), a radio telescope setup in Chile. Interesting. http://uncovercalifornia.com/content/22663-astronomers-find-pluto-sized-objects-using-alma |
Lynn Send message Joined: 20 Nov 00 Posts: 14162 Credit: 79,603,650 RAC: 123 |
Kepler Spacecraft Finds New Planet A year and a half after a pointing failure threatened to derail its epochal search for worlds beyond our solar system, NASA’s Kepler spacecraft has bagged another planet, astronomers announced Thursday. The new planet is 20,000 miles in diameter, about two and a half times the size of Earth, and 12 times as massive, putting it into a category of planets called super-Earths that do not exist in our solar system. It is unlivable, circling a star slightly smaller than the Sun about 180 light-years from here in the constellation Pisces at the roasting distance of only 8.4 million miles, less than a tenth of the distance between us and our star. http://www.nytimes.com/2014/12/19/science/kepler-spacecraft-finds-new-planet.html?_r=0 |
KLiK Send message Joined: 31 Mar 14 Posts: 1304 Credit: 22,994,597 RAC: 60 |
Kepler Spacecraft Finds New Planet It's ALIVE...Jim, it's ALIVE! ;) Kepler lives... :D non-profit org. Play4Life in Zagreb, Croatia, EU |
William Rothamel Send message Joined: 25 Oct 06 Posts: 3756 Credit: 1,999,735 RAC: 4 |
If we can find a planet of this size at 180 light years ---does that mean that there are no Earth sized planets within, say, 50-100 light years?? It may be that this planet is somewhat large and close to it's sun and therefore may be discernible as it transits across it's star on a frequent basis. So if there are Earth-sized planets within this distance they may be further out from their star and/or not in our line of sight. |
Bob DeWoody Send message Joined: 9 May 10 Posts: 3387 Credit: 4,182,900 RAC: 10 |
As I understand the method, only planets that transit across the face of a star can be detected. Meaning their orbital plane must be near to edge on relative to earth. Unless there is some bias toward this orientation we may be missing thousands of planetary systems whose orbital plane is canted at angles greater than a few degrees up to 90 degrees 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. |
William Rothamel Send message Joined: 25 Oct 06 Posts: 3756 Credit: 1,999,735 RAC: 4 |
it seems to me that a sphere would always appear as a disc and that crossing it at any angle would be discernible. They also use the wobble effect of a planet on it's star to imply a planet's existence. Retracted: I see now that we and the planet must be on the same line of sight with the star. |
Bob DeWoody Send message Joined: 9 May 10 Posts: 3387 Credit: 4,182,900 RAC: 10 |
it seems to me that a sphere would always appear as a disc and that crossing it at any angle would be discernible. They also use the wobble effect of a planet on it's star to imply a planet's existence. An object orbiting a sphere when viewed from somewhere outside the system will only cross in front of the sphere when the orbital plane is nearly edge on to the observer. When viewed from the perpendicular the object will remain nearly the same distance from the center depending on how circular the orbit is. The wobble method can determine whether a star has companions but not much else. 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. |
KLiK Send message Joined: 31 Mar 14 Posts: 1304 Credit: 22,994,597 RAC: 60 |
Actually wobble of the star only indicated that it has Jovian type of planet! ;) non-profit org. Play4Life in Zagreb, Croatia, EU |
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