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The image (yuck!) is SpaceRef.com's own graphics and has nothing to do with the original announcement. The news briefing is a teleconference, but the audio will be streamed live nonetheless.
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Science is a way of trying not to fool yourself. The first principle is that you must not fool yourself, and you are the easiest person to fool. -- Richard Feynman |
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"Barnard's Star is "clean" (poor van de Kamp!)"
Well no....it is "Clean" of a high mass planet. But any planet of 3 Earth masses or less at 1-AU is possible. So - until we have better instruments one cannot assume Barnard's Star has no planetary companion. BTW - whats with the 1989-94 "discoveries" (assumed that is what the table above implies). Pretty sure the Pulsar planets were the first ones discovered 95? 96?. |
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At the time of the discovery of the fourth planet (that was also big news) the orbits of the two outer ones were believed to be much more eccentric. Now as they've got more data, it appears that all the planets orbit in almost circular orbits (except the new one, but it's within error bars). They're not "decent" gas giants in the sense that they orbit much closer than they should, but still...
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Science is a way of trying not to fool yourself. The first principle is that you must not fool yourself, and you are the easiest person to fool. -- Richard Feynman |
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The fifth one was suspected for some time now. I guess this is just the confirmation announcement. There's another five set suspected in another system's dataset, I suppose simply unconfirmed as of yet.
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The last time I felt a warm fuzzy feeling, I was informed by my doctor that it was just gas. |
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The discoverers mention in their paper that additional planets of similar or larger mass between the planets f and d can easily avoid detection if they're in resonant orbits.
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Science is a way of trying not to fool yourself. The first principle is that you must not fool yourself, and you are the easiest person to fool. -- Richard Feynman |
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I had already placed a fictional terrestrial planet (Danzig) in that space for the Orion's Arm scenario, so I've had to make that planet a moon of 55 Cancri f.
Here is the new moon in orbit around the f planet. http://img127.imageshack.us/img127/2995/danzigiy4.png A moon in this location could conceivably be habitable, although it would be tidally locked.
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New Orion's Arm Site . The Starlark . Against a Diamond Sky (OA Novella Collection) . OA Flickr set |
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Is there enough there to test Bode's Law?
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There is a growing tendancy to think of Man as a rational, thinking being, which is absurd.- Marvin the Martian. It's gotten to the point where careful investigation is needed just to tell parody from reality. I think that means reality is broken.- Noclevername. |
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Excellent. This is the confirmation Systemic Console is a great program to find additional exoplanets before they're detected and confirmed.
Next: Mu Arae's fifth planet? ![]()
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"The more I study the Universe, the more I see a Superior Intelligence's project in it" Albert Einstein |
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Quote:
When they break the eight planet threshold or come up aces with an Earth mass terrestrial (not a pulsar planet ), I don't care where in the system it flies, gimme a call. ![]()
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The last time I felt a warm fuzzy feeling, I was informed by my doctor that it was just gas. |
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Enough where? If you mean among observed exoplanets, no.
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"If this were play'd upon a stage now, I could condemn it as an improbable fiction." Shakespeare, Twelfth Night "The Mayan symbol for "book" looks a lot like a triple hamburger, but I've never seen them claiming it as proof the Mayans had Big Macs." - KaiYeves "Distance doesn’t matter much in space, where if you just start a thing off with the right kind of shove, sooner or later it will get where you want it to go." -Frederik Pohl, Mining the Oort |
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I meant in 55 Cancri but I suppose your answer covers that.
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There is a growing tendancy to think of Man as a rational, thinking being, which is absurd.- Marvin the Martian. It's gotten to the point where careful investigation is needed just to tell parody from reality. I think that means reality is broken.- Noclevername. |
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I've made images of all the (known) planets in the 55 Cancri system now, using Celestia, the Sudarsky classification system and a bit imagination (which in my case is the least reliable part).
Here is the 'f' planet, with an imaginary Earth-like moon; it is a class II planet, with thick water vapour. This is different to the image I posted earlier, which was too blue. I based the earlier image on this picture which is probably much too blue. Here is the 'e' planet, which is probably hot enough to have clouds of silicate vapour in the atmosphere. I've imagined that such a planet might look a little yellowish- this might not be correct, but the planet's clouds might have all sorts of impurities that give it colour. Here is the next planet out, 'b', , which is not hot enough to have silicate clouds, but too hot for water clouds (Sudarsky class III). Such a planet would probably be mostly given colour by Rayleigh scattering- the same process which makes our sky blue. The next planet, 'c', is cool enough for water clouds, (Sudarsky class II) although I've added a lot of blue to the default Celestia texture to suggest that it is quite hot. The outermost planet known so far, 'd',, is probably a Sudarsky class I planet, like Saturn or Jupiter. Obviously there is a lot of variation within these classes, as Saturn and Jupiter look very different to me, but they both have the distintive yellowish cast of a Class I planet. Thanks to Grant Hutchinson, who has sorted these planets into classes for Celestia users (although I've adapted the textures somewhat).
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New Orion's Arm Site . The Starlark . Against a Diamond Sky (OA Novella Collection) . OA Flickr set |
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New transiting planet:
It could be a blend by a background eclipsing binary star but that seems unlikely. The parent star's apparent magnitude is feeble MV = 17.4! That's even less than in the case of the OGLE stars and unfortunate since that makes studying the planet very challenging.
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Science is a way of trying not to fool yourself. The first principle is that you must not fool yourself, and you are the easiest person to fool. -- Richard Feynman |
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A paper just came out yesterday on the astrophysics preprint archive which discusses the past, present, and future of planetary microlensing searches. Here is the title and author: Microlensing Searches for Planets: Results and Future Prospects B. Scott Gaudi Department of Astronomy, The Ohio State University
According to the author, the number of extrasolar planets found via microlensing has been increasing even if the results have not been published, yet. Specifically, he said: "With the recent MOA upgrade, the rate of planet detections has increased substantially. From 2003-2006, six planets were detected (four have been published). From the 2007 bulge season alone, there are four fairly secure planetary events. This rate can be expected to increase modestly as analysis techniques improve, and so the next several years should bring of order a dozen planet detections." Microlensing searches already strongly suggest that at least a third of the galaxy's single M stars have ~10 Me worlds between 1 and 4 A.U. These new discoveries should help shrink the large error bars associated with this statistic. After decades of ignorance and speculation, we are making great strides toward pinning down the value of Fp in the Drake equation. |
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OGLE finds its seventh transiting planet, an inflated one:
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Science is a way of trying not to fool yourself. The first principle is that you must not fool yourself, and you are the easiest person to fool. -- Richard Feynman |
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A new planet around Kappa Coronae Borealis b
Quote:
Planet's parameters are: HD 177830 c Period: 111.59 days Mass: 0.18 Jupiter masses Eccentricity: 0.27 Average separation: 0.59 AUs And eccentricity for planet b has been edited with 0.046. This means: another Hot Neptune. Moreover this means probable discoveries via Systemic Console may anticipate Exoplanets' detections. Take a look.
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"The more I study the Universe, the more I see a Superior Intelligence's project in it" Albert Einstein |
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My discovery about planet discovery: JPL Planet Quest: New Worlds Atlas.
Has this been around a while or is it something new? JPL seems to be promoting it as a new multimedia tool.
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December 10 date was a misunderstanding. The project had a meeting, but it was not a press meeting.
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Science is a way of trying not to fool yourself. The first principle is that you must not fool yourself, and you are the easiest person to fool. -- Richard Feynman |
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