http://solar-flux.forumandco.com/general-questions-f11/-t1.htm If you have questions about creating a scientifically feasible world, or some aspect of a world that you are working on, post it here. Sun, 22 Nov 2009 15:17:19 GMT 10 http://i159.photobucket.com/albums/t137/CrossingStyx/Forum/Title_test5.jpg http://solar-flux.forumandco.com/general-questions-f11/-t1.htm http://solar-flux.forumandco.com/general-questions-f11/a-mix-of-venus-and-titan-t435.htm Stalker Hi I am imagining a planet. And I have some questions (in bold) Let us imagine a planet slightly smaller than the Earth, as Venus or else smaller. Bigger than Mars, to remain geologically active. As on Venus, the water does not remain liquid, greenhouse effect accelerates. Let us imagine now that the cloud cover of ice crystals forms more quickly than on Venus, and especially let us imagine that it is more spread. She would block the sunlight and greenhouse effect goes down with time. The ... General Questions Sun, 22 Nov 2009 15:17:19 GMT http://solar-flux.forumandco.com/general-questions-f11/a-mix-of-venus-and-titan-t435.htm#2949 http://solar-flux.forumandco.com/general-questions-f11/a-mix-of-venus-and-titan-t435.htm http://solar-flux.forumandco.com/general-questions-f11/color-of-alien-plants-t264.htm NuclearVacuum
Is there some pattern that I am missing?]]> General Questions Thu, 19 Feb 2009 21:57:56 GMT http://solar-flux.forumandco.com/general-questions-f11/color-of-alien-plants-t264.htm#1550 http://solar-flux.forumandco.com/general-questions-f11/color-of-alien-plants-t264.htm http://solar-flux.forumandco.com/general-questions-f11/planet-insolation-t299.htm Sirius_Alpha
Also, what about an equation that takes into account the radius of the star?]]> General Questions Sun, 03 May 2009 02:27:40 GMT http://solar-flux.forumandco.com/general-questions-f11/planet-insolation-t299.htm#1753 http://solar-flux.forumandco.com/general-questions-f11/planet-insolation-t299.htm http://solar-flux.forumandco.com/general-questions-f11/hd-81688-as-41-lyncis-t426.htm Edasich http://en.wikipedia.org/wiki/41_Lyncis The K0III-IV giant HD 81688 is listed as star 41 Lyncis. But star is not listed at SIMBAD neither elsewhere, nor as disused star designation. Got more informations? Thanks P.S If discussion is offtopic, redirect elsewhere General Questions Mon, 16 Nov 2009 12:46:25 GMT http://solar-flux.forumandco.com/general-questions-f11/hd-81688-as-41-lyncis-t426.htm#2881 http://solar-flux.forumandco.com/general-questions-f11/hd-81688-as-41-lyncis-t426.htm http://solar-flux.forumandco.com/general-questions-f11/beta-pictoris-sytem-t413.htm Stalker Hi I try to make articles on Beta Pictoris, its planets and its discs of material, but it is not easy thing. Indeed I found a lot of very blended information, and I really do not know how to sort out. No information really contradicts other one, but there is so much that I want to ask for your opinion. What is interessant, and what is out-of-date? I make you a flowchart with what I already have succeeds in sorting out. Planet b is the imaged (end transiting?) planet Planets ... General Questions Sun, 01 Nov 2009 17:04:15 GMT http://solar-flux.forumandco.com/general-questions-f11/beta-pictoris-sytem-t413.htm#2702 http://solar-flux.forumandco.com/general-questions-f11/beta-pictoris-sytem-t413.htm http://solar-flux.forumandco.com/general-questions-f11/psr-b125712-d-t378.htm Sirius_Alpha
I honestly don't know what this object's status is, and I can't find anything about it on ArXiv. =|]]> General Questions Wed, 09 Sep 2009 03:34:39 GMT http://solar-flux.forumandco.com/general-questions-f11/psr-b125712-d-t378.htm#2400 http://solar-flux.forumandco.com/general-questions-f11/psr-b125712-d-t378.htm http://solar-flux.forumandco.com/general-questions-f11/classification-of-extrasolar-planets-t374.htm NuclearVacuum I am very knit picky, I love to classify things into categories. I wanted to know if anybody has heard of any attempt to make an official classification system of exoplanets. If there isn't, I think I will introduce my proposal. For the past year, I have been working on an expanded version of Sudarsky's system. I believe I am close to being done, but recently I have been hitting road blocks. I know I am going to get complains on my classification proposal, but I want your help in perfecting ... General Questions Sat, 05 Sep 2009 01:30:16 GMT http://solar-flux.forumandco.com/general-questions-f11/classification-of-extrasolar-planets-t374.htm#2369 http://solar-flux.forumandco.com/general-questions-f11/classification-of-extrasolar-planets-t374.htm http://solar-flux.forumandco.com/general-questions-f11/wrong-formula-t365.htm Sedna Hello everybody, It's me... again. But this time it's not for a question, it's for a mistake. I found that the following equation, A = ((1329x10^(-H/5))/D)^2 where A is the albedo, H is the absolute magnitude of the star and D is the diameter of the planet in kilometers, is entirely wrong. Using it with Sun and Earth, the result is A = ((1329x10^(-4.85/5)/12,756)^2 = 0.000124629 (the albedo of the Earth is supposed to be approximatively 0.35). So I replaced the diameter by the surface ... General Questions Wed, 26 Aug 2009 15:01:57 GMT http://solar-flux.forumandco.com/general-questions-f11/wrong-formula-t365.htm#2289 http://solar-flux.forumandco.com/general-questions-f11/wrong-formula-t365.htm http://solar-flux.forumandco.com/general-questions-f11/colors-vs-albedo-t364.htm Sedna Hey everybody, I have one question for you. Colors respond to a HSV classification (see this page for more details) or HSB. Precisely, the letter "V" (or "B") makes me interested. The question is "Does this letter indicates the albedo or not ?" If not, is there another correlation between colors and albedo ? Bye Sedna General Questions Sat, 22 Aug 2009 13:53:46 GMT http://solar-flux.forumandco.com/general-questions-f11/colors-vs-albedo-t364.htm#2269 http://solar-flux.forumandco.com/general-questions-f11/colors-vs-albedo-t364.htm http://solar-flux.forumandco.com/general-questions-f11/fixed-rotation-t298.htm NuclearVacuum How close would a planet need to be from its parent star to loose its rotation and be tidally locked to the star? Would close orbiting stars (like DEL Tri and IOT Peg) be tidally locked onto each other? General Questions Thu, 30 Apr 2009 17:58:07 GMT http://solar-flux.forumandco.com/general-questions-f11/fixed-rotation-t298.htm#1738 http://solar-flux.forumandco.com/general-questions-f11/fixed-rotation-t298.htm http://solar-flux.forumandco.com/general-questions-f11/planetary-systems-around-w-ursae-majoris-type-stars-t360.htm Darkness nova Would the formation of such a system disrupt the planet forming process and would the two stars make the HZ of the system expand outward due to the heat of two stars instead of one? Finally since there are two stars wouldn't that mean that the planets in such a system would be larger and more massive since two stars formed and would have at least twice the amount of mass around them as a regular star of similar spectral type and mass? I ask this because I found the W ursae majoris add-on for ... General Questions Sun, 16 Aug 2009 22:14:09 GMT http://solar-flux.forumandco.com/general-questions-f11/planetary-systems-around-w-ursae-majoris-type-stars-t360.htm#2245 http://solar-flux.forumandco.com/general-questions-f11/planetary-systems-around-w-ursae-majoris-type-stars-t360.htm http://solar-flux.forumandco.com/general-questions-f11/accrete-algorithm-t357.htm drippel
I'm working on a software, in which I want to generate random systems. I know there are a few systems generation programs floating around, but I want to write my own so I can tweak it as I see fit. Almost all (if not all) of these are based on some version or permutation of the Accrete algorithm, but I cannot find it anywhere on the web.

Does anyone have access to some copy of the Accrete algorithm, or a point me to somewhere I can get it?

Thanks.]]> General Questions Wed, 12 Aug 2009 05:52:11 GMT http://solar-flux.forumandco.com/general-questions-f11/accrete-algorithm-t357.htm#2203 http://solar-flux.forumandco.com/general-questions-f11/accrete-algorithm-t357.htm http://solar-flux.forumandco.com/general-questions-f11/a-couple-of-questions-t305.htm Edasich
1 - Could eccentric and highly eccentric exoplanets (e>0.6) retain stable satellites? If yes, which mass upper limit?

2 - How to get planetary temperatures knowing planet's mass and radius and host star's luminosity?

Thank you for the attention ]]> General Questions Sat, 16 May 2009 19:20:01 GMT http://solar-flux.forumandco.com/general-questions-f11/a-couple-of-questions-t305.htm#1790 http://solar-flux.forumandco.com/general-questions-f11/a-couple-of-questions-t305.htm http://solar-flux.forumandco.com/general-questions-f11/request-a-brown-dwarf-from-past-2007-2008-t262.htm Edasich I don't know if it's the right section. If so, feel free to redirect elsewhere. I was searching information about a brown dwarf companion orbiting a solar-like (or slightly evolved) star in Bootes. The dilemma is I don't remember the host star. It's gotta be an HD 12xxxx something. Maybe the substellar object has been announced but not officially published. Anyway it lies within system snowline, I think (between 1-2 AUs). Can anybody help me? General Questions Sat, 14 Feb 2009 13:34:30 GMT http://solar-flux.forumandco.com/general-questions-f11/request-a-brown-dwarf-from-past-2007-2008-t262.htm#1541 http://solar-flux.forumandco.com/general-questions-f11/request-a-brown-dwarf-from-past-2007-2008-t262.htm http://solar-flux.forumandco.com/general-questions-f11/who-will-be-first-to-detect-earth-mass-planet-t221.htm Sirius_Alpha Transiting/non-transiting, habitable/hellish, doesn't matter. Just as long as it's mass is ~ 1 M_earth.

Edit: With the announcement of Gliese 581 e, I think I should refine "~ 1 M_earth" to be any planet whose mass is between 0.9 M_earth to 1.1 M_earth, as stated in a post after this.]]> General Questions Mon, 22 Dec 2008 05:19:51 GMT http://solar-flux.forumandco.com/general-questions-f11/who-will-be-first-to-detect-earth-mass-planet-t221.htm#1309 http://solar-flux.forumandco.com/general-questions-f11/who-will-be-first-to-detect-earth-mass-planet-t221.htm http://solar-flux.forumandco.com/general-questions-f11/55-cancri-t296.htm Dnoces Would it be possible for 55 Cnc f to be in fact 2 planets in 1:2 tidal lock? If so, what parameters (orbit, mass) would they have? Thanks in advance. General Questions Sun, 26 Apr 2009 21:01:40 GMT http://solar-flux.forumandco.com/general-questions-f11/55-cancri-t296.htm#1731 http://solar-flux.forumandco.com/general-questions-f11/55-cancri-t296.htm http://solar-flux.forumandco.com/general-questions-f11/black-hole-system-with-planets-t287.htm NuclearVacuum
Lets say that there is a binary system comprising of a stellar black hole and a solar main sequence star. Both orbit each other in a fairly circular orbit that makes them about 100 AU away from each other. Could planets (let alone habitable planets or life) exist around the solar twin star?]]> General Questions Sat, 11 Apr 2009 22:22:58 GMT http://solar-flux.forumandco.com/general-questions-f11/black-hole-system-with-planets-t287.htm#1678 http://solar-flux.forumandco.com/general-questions-f11/black-hole-system-with-planets-t287.htm http://solar-flux.forumandco.com/general-questions-f11/request-a-paper-t283.htm Edasich Is there anybody able to get full-text version for one of these abstracts? http://cdsads.u-strasbg.fr/abs/2004PhDT........14M http://cdsads.u-strasbg.fr/abs/2003AAS...203.0604M I've tried at my university, but zero result. It seems it can be only purchased. Or not? Thank you very much. General Questions Sat, 04 Apr 2009 10:39:33 GMT http://solar-flux.forumandco.com/general-questions-f11/request-a-paper-t283.htm#1663 http://solar-flux.forumandco.com/general-questions-f11/request-a-paper-t283.htm http://solar-flux.forumandco.com/general-questions-f11/question-on-lambda-symbol-for-light-t225.htm marasama
λ_peak = is the peak of the arc.
λ_c = I not sure, but does this mean the continuum of the light?
λ₀ = ???, I am thinking it is the beginning of the wave? Not sure.]]> General Questions Wed, 24 Dec 2008 00:08:22 GMT http://solar-flux.forumandco.com/general-questions-f11/question-on-lambda-symbol-for-light-t225.htm#1331 http://solar-flux.forumandco.com/general-questions-f11/question-on-lambda-symbol-for-light-t225.htm http://solar-flux.forumandco.com/general-questions-f11/purple-planet-t121.htm NuclearVacuum Celestia add-on for Alpha Centauri. What atmospheric chemistry would be possible that would result in a purple planet (purple sky, oceans, etc.)? Could this be possible, or not?]]> General Questions Sat, 27 Sep 2008 00:26:04 GMT http://solar-flux.forumandco.com/general-questions-f11/purple-planet-t121.htm#686 http://solar-flux.forumandco.com/general-questions-f11/purple-planet-t121.htm http://solar-flux.forumandco.com/general-questions-f11/moons-of-tidally-locked-planets-t131.htm NuclearVacuum
I really hope you guys don't mind me asking all these questions, but I can't find any other place better to ask them ]]> General Questions Thu, 09 Oct 2008 01:22:39 GMT http://solar-flux.forumandco.com/general-questions-f11/moons-of-tidally-locked-planets-t131.htm#749 http://solar-flux.forumandco.com/general-questions-f11/moons-of-tidally-locked-planets-t131.htm http://solar-flux.forumandco.com/general-questions-f11/calculating-abs-mag-without-app-mag-t157.htm Sirius_Alpha Is there some way I can calculate the absolute magnitude of an object knowing only it's, Temperature, Radius, and Distance? I can't seem to find an appropriate equation. General Questions Sun, 02 Nov 2008 19:37:26 GMT http://solar-flux.forumandco.com/general-questions-f11/calculating-abs-mag-without-app-mag-t157.htm#862 http://solar-flux.forumandco.com/general-questions-f11/calculating-abs-mag-without-app-mag-t157.htm http://solar-flux.forumandco.com/general-questions-f11/rotation-orbit-resonance-t149.htm Pfhreak
Is there any idea what ratios are possible, and what relationship there is between eccentricity and ratio? For example, is a 4:3 resonance possible, and, if so, at approximately what eccentricity range would it occur?]]> General Questions Wed, 22 Oct 2008 03:05:27 GMT http://solar-flux.forumandco.com/general-questions-f11/rotation-orbit-resonance-t149.htm#827 http://solar-flux.forumandco.com/general-questions-f11/rotation-orbit-resonance-t149.htm http://solar-flux.forumandco.com/general-questions-f11/s-index-t155.htm Sirius_Alpha http://nsted.ipac.caltech.edu/ you can search stars and get a table of data.
Anyone know what S-index means?]]> General Questions Sat, 01 Nov 2008 01:51:58 GMT http://solar-flux.forumandco.com/general-questions-f11/s-index-t155.htm#855 http://solar-flux.forumandco.com/general-questions-f11/s-index-t155.htm http://solar-flux.forumandco.com/general-questions-f11/alien-ph-question-t86.htm NuclearVacuum This question has been bothering me for a bit now. I can't think of any other way to ask it without making it into a story. Lets say that an alien visitor comes to the Earth. However, he's home world is a planet with ammonia oceans (which is a base to humans). Ammonia and water have a pH difference of about 4. Would water feel to the alien as acid would feel to a human? And vise versa: would an alien from a planet with acidic oceans think water would feel like a base? I know, this ... General Questions Mon, 25 Aug 2008 17:44:57 GMT http://solar-flux.forumandco.com/general-questions-f11/alien-ph-question-t86.htm#511 http://solar-flux.forumandco.com/general-questions-f11/alien-ph-question-t86.htm http://solar-flux.forumandco.com/general-questions-f11/sudarsky-classification-t120.htm NuclearVacuum I have a question about the Sudarsky classification system on hot Jupiters. Why are there two separate classes of hot Jupiters? I do not see much of a difference between a "class IV" and a "class V" that they require two different classes. General Questions Fri, 26 Sep 2008 14:09:13 GMT http://solar-flux.forumandco.com/general-questions-f11/sudarsky-classification-t120.htm#681 http://solar-flux.forumandco.com/general-questions-f11/sudarsky-classification-t120.htm http://solar-flux.forumandco.com/general-questions-f11/whatmough-sulfur-giants-t118.htm Edasich I have an important question about world building. The dear Whatmough speculated about the existence of Sulfur Jovians, i.e hot water jovians within Venusian orbital zones. Water-richs but stained of sulfur clouds with yellowish appearance. I remember such a speculation has been ruled out, I think. Which model could replace old sulfur jovians and which appearance would such planets have? Thank you for the attention. General Questions Wed, 24 Sep 2008 10:53:00 GMT http://solar-flux.forumandco.com/general-questions-f11/whatmough-sulfur-giants-t118.htm#672 http://solar-flux.forumandco.com/general-questions-f11/whatmough-sulfur-giants-t118.htm http://solar-flux.forumandco.com/general-questions-f11/mass-of-55-cnc-a-t98.htm Sirius_Alpha The Extrasolar Planets Encyclopedia lists the mass of 55 Cancri A as 1.03 solar masses. But if you calculate the mass of the star using the parameters of the planet's orbits, you 0.94 solar masses. The only exception to this is 55 Cnc e, whose orbital parameters suggest a mass of 0.92 solar masses. General Questions Sun, 07 Sep 2008 21:10:53 GMT http://solar-flux.forumandco.com/general-questions-f11/mass-of-55-cnc-a-t98.htm#583 http://solar-flux.forumandco.com/general-questions-f11/mass-of-55-cnc-a-t98.htm http://solar-flux.forumandco.com/general-questions-f11/appearance-of-ice-giants-t84.htm Sirius_Alpha With the Sudarsky classification scheme for gas planets, we sort of have an idea what they're supposed to look like at various temperatures and, consequently, locations in a solar system. What about the ice giants like Neptune and Uranus? The only two we've seen up close are well... blue. Would the appearance of ice giants at other temperatures be predictable by a Sudarsky-type classification scheme? Or do they all essentially look almost the same? Does GJ 436 b look comparable to Uranus and ... General Questions Thu, 21 Aug 2008 20:58:25 GMT http://solar-flux.forumandco.com/general-questions-f11/appearance-of-ice-giants-t84.htm#498 http://solar-flux.forumandco.com/general-questions-f11/appearance-of-ice-giants-t84.htm http://solar-flux.forumandco.com/general-questions-f11/organic-chemistry-question-t71.htm Sirius_Alpha
So far I have:
diacetylene,
methylacetylene
acetylene
propane
cyanoacetylene
hydrogen cyanide
cyanogen]]> General Questions Fri, 08 Aug 2008 03:51:14 GMT http://solar-flux.forumandco.com/general-questions-f11/organic-chemistry-question-t71.htm#440 http://solar-flux.forumandco.com/general-questions-f11/organic-chemistry-question-t71.htm http://solar-flux.forumandco.com/general-questions-f11/mass-gravity-relation-question-t35.htm Sirius_Alpha
Basically, does Mercury have more gravity when it approaches aphelion?]]> General Questions Tue, 17 Jun 2008 23:44:40 GMT http://solar-flux.forumandco.com/general-questions-f11/mass-gravity-relation-question-t35.htm#144 http://solar-flux.forumandco.com/general-questions-f11/mass-gravity-relation-question-t35.htm http://solar-flux.forumandco.com/general-questions-f11/carbon-jovians-t33.htm Edasich I was thinking about an eerie object, maybe likely to orbit A-type stars and earlier spectral types. Since Neptune-sized carbon planets have been inferred around stellar degenerates, silicate jovians have been confirmed (HD 189733 b) and chthonian planets exist, may carbon-based hot jupiters around hot stars exist? There is a lack of close in exoplanets around these stars and such objects would show very low densities (I think, if I'm wrong, correct me) and bloated radii. Who know? ... General Questions Tue, 17 Jun 2008 19:14:13 GMT http://solar-flux.forumandco.com/general-questions-f11/carbon-jovians-t33.htm#138 http://solar-flux.forumandco.com/general-questions-f11/carbon-jovians-t33.htm