10-29-2010, 09:32 AM | #11 | |
Aluminated
Join Date: Feb 2005
Location: East of the moon, west of the stars, close to buses and shopping
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Re: [Space] GURPS Handbook of the Planets
Quote:
That really requires a hardware rather than a software solution, and I'm going to stop before taking that joke any further.
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I've been making pointlessly shiny things, and I've got some gaming-related stuff as well as 3d printing designs. Buy my Warehouse 23 stuff, dammit! |
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10-29-2010, 09:55 AM | #12 |
Experimental Subject
Join Date: Jan 2005
Location: saarbrücken, germany
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Re: [Space] GURPS Handbook of the Planets
I was really looking for a short-term solution anyway.
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Like a mail order mogwai...but nerdier - Nymdok understanding is a three-edged sword
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10-29-2010, 10:48 AM | #13 |
Join Date: Jan 2006
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Re: [Space] GURPS Handbook of the Planets
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10-29-2010, 03:58 PM | #14 |
Wielder of Smart Pants
Join Date: Aug 2004
Location: Ventura CA
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Re: [Space] GURPS Handbook of the Planets
The internets? I think that if I suffered from a paucity of players, I'd seriously try to run a game with MapTools (or similar).
QFT. |
10-30-2010, 06:32 AM | #15 |
Join Date: May 2005
Location: Oz
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Re: [Space] GURPS Handbook of the Planets
In the 1st 1,000 systems in Universe 1, the these have affinity 5+.
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Decay is inherent in all composite things. Nod head. Get treat. Last edited by Agemegos; 10-30-2010 at 09:04 AM. |
10-30-2010, 06:52 AM | #16 |
Join Date: May 2005
Location: Oz
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Re: [Space] GURPS Handbook of the Planets
In the 2nd thousand systems in Universe 1, these have habitability 5+
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Decay is inherent in all composite things. Nod head. Get treat. Last edited by Agemegos; 10-30-2010 at 09:05 AM. |
10-30-2010, 08:16 AM | #17 |
Join Date: May 2005
Location: Oz
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Re: [Space] GURPS Handbook of the Planets
Among Systems 2,001 to 12,000 of Universe 1, the following are of great interest:
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Decay is inherent in all composite things. Nod head. Get treat. Last edited by Agemegos; 10-30-2010 at 09:07 AM. |
10-30-2010, 09:22 AM | #18 |
Join Date: May 2005
Location: Oz
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Re: [Space] GURPS Handbook of the Planets
Let's take a look at that System 5794:
Code:
Primary star Name of star: system number: 5794 class of star: G1 V mass: 1.05 M_ luminosity: 1.53 L_ age: 5.6 Gya. diameter: 0.0110 a.u. Planets & moons ID# orbit radius world type size mass grav. atmosphere hydrograph. temp. climate solar day Hab. RVM Affinity (AU)(10,000 km) (D_) (M–) (g.) (C) (hours) I 0.18 large gas giant 12 600 3.9 superdense corrosive infinite 1 moonlet 428 infernal 0 -1 -1 II 0.33 medium gas giant 11 300 2.6 superdense corrosive 3285 III 1.5 large gas giant 12 600 3.9 superdense corrosive 164 6 moonlets -28 very cold 0 1 1 IIIa 127 standard garden moon 0.85 0.56 0.77 standard breathable 100% water -24 very cold 164 4 0 4 IIIb 155 small rock moon 0.55 0.11 0.38 none -31 frozen 221 0 0 0 IIIc 185 standard garden moon 0.80 0.45 0.72 thin breathable 50% water -4 chilly 289 6 0 6 IIId 220 small rock moon 0.45 0.07 0.36 none -31 frozen 379 0 0 0 1 moonlet -28 very cold 0 -1 -1 IV 6.5 small gas giant 2.9 10 1.2 superdense corrosive 99.5 4 moonlets -156 frozen 0 0 0 IVa 15 tiny sulfur moon 0.28 0.01 0.11 none -180 frozen 49.2 -2 0 -2 IVb 23 small ice moon 0.47 0.04 0.19 dense mildly toxic 60% h'carb. -153 frozen 99.5 -1 0 -1 5 moonlets -156 frozen 0 0 0 V 12 small gas giant 4.5 20 0.99 superdense corrosive 493 7 moonlets -188 frozen 0 0 0 Va 86 standard ice moon 0.50 0.12 0.45 very thin suffocating -183 frozen 493 0 0 0 3 moonlets -188 frozen 0 0 0 VI 21 small gas giant 3.9 15 1.0 superdense corrosive 115 6 moonlets -208 frozen 0 -1 -1 VIa 30 tiny ice moon 0.19 0.00 0.09 none -215 frozen 115 0 0 0 VIb 50 tiny ice moon 0.17 0.00 0.10 none -215 frozen 255 0 0 0 1 moonlet -208 frozen 0 0 0 VII 34 large gas giant 14 1500 8.1 superdense corrosive 28.6 11 moonlets -222 frozen 0 0 0 VIIa 104 tiny sulfur moon 0.18 0.00 0.07 none -232 frozen 75.7 -1 0 -1 VIIb 124 tiny ice moon 0.19 0.00 0.09 none -227 frozen 98.7 0 0 0 VIIc 148 small hadean moon 0.29 0.01 0.12 none -237 frozen 129 0 0 0 VIId 180 small hadean moon 0.27 0.01 0.13 none -237 frozen 173 0 0 0 Here's World IIIa, the watery moon: Code:
System number: 5794 Planet: IIIa Planetology class of star: G1 V mean distance: 1.50 AU perihelion: 0.60 AU aphelion: 2.40 AU axial tilt: annual period: 1.788 years 95.8 local days local day: 163 h. 43' orbital period: 6.8 std. days standard garden moon diameter: 0.85 x Earth's 10,896 km density: 0.9 x Earth's 5.0 g/cm^3 surface gravity: 0.77 g. 7.5 m/s^2 escape velocity: 9.1 km/s vulcanism : light tectonics : none climate: very cold temperature average: -24 C periphelion: 123 C aphelion: -77 C illumination: 70% x Earth's oceans: 100% composition: water tidal range: 0.14 m atmosphere main gases: N2, O2 traces &c.: class: breathable pressure: 0.85 bar (standard) Sun & moons apparent ... tide induced class size period sun: G1 V 0.42° 163.7 hr 0.14 m III: large gas giant 7.15° fixed Population & economy habitability: 4 RVM: 0 resources: average affinity: 4 settlement type: carrying cap.: 218.9 E+6 population: 218.9 E+6 PR: 8 tech level: 10 average income: G$ 60,300 typical wealth: average economic volume: G$ 13.2 e+12 Code:
System number: 5794 Planet: IIIc Planetology class of star: G1 V mean distance: 1.50 AU perihelion: 0.60 AU aphelion: 2.40 AU axial tilt: annual period: 1.788 years 54.3 local days local day: 288 h. 41' orbital period: 11.8 std. days standard garden moon diameter: 0.80 x Earth's 10,148 km density: 0.9 x Earth's 5.0 g/cm^3 surface gravity: 0.72 g. 7.0 m/s^2 escape velocity: 8.5 km/s vulcanism : moderate tectonics : light climate: chilly temperature average: -4 C periphelion: 143 C aphelion: -57 C illumination: 70% x Earth's oceans: 50% composition: water tidal range: 0.13 m atmosphere main gases: N2, O2 traces &c.: class: breathable pressure: 0.72 bar (thin) Sun & moons apparent ... tide induced class size period sun: G1 V 0.42° 288.7 hr 0.13 m III: large gas giant 4.93° fixed Population & economy habitability: 6 RVM: 0 resources: average affinity: 6 settlement type: carrying cap.: 759.5 E+6 population: 759.5 E+6 PR: 8 tech level: 10 average income: G$ 60,300 typical wealth: average economic volume: G$ 45.8 e+12
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Decay is inherent in all composite things. Nod head. Get treat. |
10-30-2010, 09:51 AM | #19 |
Join Date: May 2005
Location: Oz
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Re: [Space] GURPS Handbook of the Planets
Here's System 10980 in Universe 1
Code:
system number: 10980 companion stars: 1 class of star: G0 III 1. mass: 0.40 periapsis: 220 a.u. mass: 1.1 M_ class: M2 V apapsis: 880 a.u. luminosity: 55.00 L_ age: 9.6 Gya. diameter: 0.2245 a.u. Planets & moons ID# orbit radius world type size mass grav. atmosphere hydrograph. temp. climate solar day Hab. RVM Affinity (AU)(10,000 km) (D_) (M–) (g.) (C) (hours) 0.26 asteroid belt 1179 infernal 0 1 1 0.43 asteroid belt 841 infernal 0 1 1 I 0.74 small rock planet 0.96 0.61 0.67 none 572 infernal infinite 0 0 0 II 1.1 large chthonian planet 2.0 8.3 2.0 none 424 infernal 16.4 0 0 0 III 1.9 standard chthonian planet 1.3 1.8 1.1 none 262 infernal 12.6 0 -1 -1 IV 3.6 small rock planet 0.69 0.23 0.48 none 111 infernal 16.7 0 -1 -1 V 6.1 large ocean planet 1.4 2.7 1.3 very dense highly toxic 100% water 42 tropical 787 -1 0 -1 Va 61 standard garden moon 0.56 0.19 0.62 thin breathable 70% water 36 warm 787 7 0 7 VI 9.1 standard garden planet 0.92 0.77 0.92 standard marginal 50% water 5 cool 581 6 0 6 VIa 33 tiny rock moon 0.25 0.01 0.20 none -30 frozen 581 0 0 0 VII 15 small rock planet 0.40 0.06 0.36 none -83 frozen 654 0 0 0 VIIa 15 tiny rock moon 0.16 0.00 0.13 none -81 frozen 654 0 0 0 VIII 47 medium gas giant 11 300 2.6 superdense corrosive 184 7 moonlets -166 frozen 0 0 0 VIIIa 110 standard ice moon 0.54 0.15 0.54 very thin suffocating 20% water -161 frozen 184 0 -1 -1 VIIIb 122 small ice moon 0.42 0.04 0.21 very dense mildly toxic 80% h'carb. -158 frozen 214 -1 0 -1 VIIIc 139 tiny ice moon 0.09 0.00 0.04 none -178 frozen 262 0 -2 -2 VIIId 156 tiny ice moon 0.37 0.02 0.15 none -178 frozen 312 0 0 0 VIIIe 178 tiny ice moon 0.24 0.01 0.12 none -178 frozen 381 0 -1 -1 Let's take a look at the sheet for Va. Code:
System number: 10980 Planet: Va Planetology class of star: G0 III mean distance: 6.09 AU perihelion: 6.09 AU aphelion: 6.09 AU axial tilt: annual period: 14.324 years 159.6 local days local day: 786 h. 33' orbital period: 32.6 std. days standard garden moon diameter: 0.56 x Earth's 7,137 km density: 1.1 x Earth's 6.1 g/cm^3 surface gravity: 0.62 g. 6.0 m/s^2 escape velocity: 6.6 km/s vulcanism : none tectonics : none climate: warm temperature average: 36 C periphelion: 36 C aphelion: 36 C illumination: 153% x Earth's oceans: 70% composition: water tidal range: 0.00 m atmosphere main gases: N2, O2 traces &c.: class: breathable pressure: 0.55 bar (thin) Sun & moons apparent ... tide induced class size period sun: G0 III 2.11° 786.5 hr 0.00 m V: large ocean planet 1.72° fixed Population & economy habitability: 7 RVM: 0 resources: average affinity: 7 settlement type: carrying cap.: 813.9 E+6 population: 813.9 E+6 PR: 8 tech level: 10 average income: G$ 67,000 typical wealth: average economic volume: G$ 54.5 e+12 Note that despite Planet V's strong tidal effects of Moon Va, the resulting tides do not rise or fall. That's because Va is tide-locked, and does not rotate through its tidal bulges. the mantle will have time to adjust fully, and Va will be the same shape as its oceans (i.e. prolate on the axis aligned with V).
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Decay is inherent in all composite things. Nod head. Get treat. Last edited by Agemegos; 10-30-2010 at 09:56 AM. |
10-30-2010, 10:56 AM | #20 |
Join Date: May 2005
Location: Oz
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Re: [Space] GURPS Handbook of the Planets
Well, that's about enough of generating huge numbers of systems and skimming through the results. It took my quaint little computer about half an hour of actual running time to generate those 12,000 systems, which is pretty shocking, and shows how inefficient my approach is. But still, it does work.
Now let's take a look at designing a planet and inserting it into a system. I'm going to try to see how close to its star I can get a habitable planet. Close to the star means hot, which means that the light molecules in the atmosphere will tend to escape. I'm going to want to make the escape velocity as high as I can to keep the atmosphere where it ought to be. I think this means that I actually want a standard planet, not a large one. Let's see. I try a standard garden world with a breathable atmosphere. I give it a thin atmosphere in the hopes that that will keep it cool in close to the star. I choose 90% hydrographics to keep the Habitability as high as possible in the face of high temperatures. The control panel tells me that the temperature range ought to be 250 to 340 Kelvins: I put in 340 to keep as close to the star as possible. That's 67 C average surface temperature. I must say that I marvel that that is considered habitable at all: even the polar regions must be nearly 40 C. Never mind. I'm offered a range of densities from 0.8 to 1.2, I try 0.8. The machine offers me a range of gravities from 0.65 to 1.39. I try 0.65. The machine (which is assuming an F2 V star for the moment) tells me that the orbital radius will be 1.30 AU. I try 1.39 gravities: no change. I backtrack and see whether high density will help (it ought to raise the escape velocity at given mass, not that I have given mass). Density 1.2. Now I'm allowed gravity 0.53 to 1.13. It shouldn't matter, but I try both extremes.It doesn't matter, and I'm still at 1.30 AU. Okay, time to backtrack even further: will a dense atmosphere actually help? Put in 1.8 for the primordial atmospheric mass. Options for density don't change. I try the minimum and maximum gravities. Orbital radius works out 1.97 at each extreme. So a dense atmosphere does not confound expectations. Back to minimum atmospheric mass. It looks as though the closest I can get this standard world to its (F2) star is 1.3 AU. I try very quickly with a large garden planet. It turns out not to make a difference. So I assign an orbital eccentricity (0), and axial tilt (11°), a primordial day length of 16 hours, and (on a whim) choose to have no major moons and two moonlets. I pick a RVM of 2 to make up for the fact that this place is only marginally habitable, and assign both volcanism and tectonics moderate. Putting in TL10 and population equal to carrying capacity I get a planet sheet like this: Code:
System number: 12 Planet: III Planetology class of star: F2 V mean distance: 1.30 AU perihelion: 1.30 AU aphelion: 1.30 AU axial tilt: 11° annual period: 1.215 years 662.6 local days local day: 16 h. 4' large garden planet diameter: 0.95 x Earth's 12,118 km density: 1.2 x Earth's 6.6 g/cm^3 surface gravity: 1.14 g. 11.2 m/s^2 escape velocity: 11.7 km/s vulcanism : moderate tectonics : moderate climate: very hot temperature average: 67 C periphelion: 67 C aphelion: 67 C illumination: 339% x Earth's oceans: 90% composition: water tidal range: 0.25 m atmosphere main gases: N2, H2O traces &c.: class: breathable pressure: 1.7 bar (very dense) Sun & moons apparent ... tide induced class size period sun: F2 V 0.64° 16.1 hr 0.25 m Population & economy habitability: 4 RVM: 2 resources: very abundant affinity: 6 settlement type: carrying cap.: 1.1 E+9 population: 1.1 E+9 PR: 9 tech level: 10 average income: G$ 60,300 typical wealth: average economic volume: G$ 65.3 e+12
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Decay is inherent in all composite things. Nod head. Get treat. |
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planets, space, star system generator, system generation, world generation |
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