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Azia Burgi Caldari Science and Trade Institute	Posted - 2008.01.22 14:42:00 - [1] Hello Everyone! With the recent data export I decided to see how many of the 45,000+ planets in New Eden are actually habitable. Of the three types of planet in Eve I have decided that only Solid planets are habitable. Not many humans live on gas giants or at least none of the ones I have met do (maybe I'm not going to the right bars). This returns 15,000 results. Now I have to work out if the planet lies in the comfort zone or life band of its parent star. This is where it warm enough for liquid water to exist on the surface. To do this I followed the guide here: http://www.cix.co.uk/~morven/worldkit/#astro-sun Any planet where the orbital radius is less then the value in Rmin is probably too hot and any planet over Rmax is probably far too cold for humans. So the number of planets in this zone is 740. Next we have narrow down the surface temperature to only include temperatures between 0C and 100C. The database lists the average global surface temperature in Kelvin. There are 3 planets with Venus like temperatures (over 1000C) and 548 planets with sub-zero temperatures, leaving 189 planets where liquid water can occur. So we have liquid water, next thing needed for normal healthy humans is gravity. According to this website Earth has a gravity of 9.8m/s^2. No planet in the database has this gravity, but there are several pretty close. I've assumed that a deviation of +/-1 from standard gravity is safe enough for human physiology for extended periods of time. They are (sorry about the formatting): itemNamesurfaceGravityDeviationFromStdGrav 0-6VZ5 III10.78450.9845 Eurgrana V10.2010.401 Enedore II9.53309-0.26691 B-DXO9 III9.50157-0.29843 JE-VLG II9.47627-0.32373 HJO-84 IV9.01057-0.78943 J-Z1UW IV8.90512-0.89488 As you can see Enedore II is the closest to standard gravity. Happily it also the warmest surface temperature at 13.39C. It is also similar in size to Earth 12,394.04km in diameter. The density is also close to Earth at 5503.87kg/m^3. The game claims that it has a year of 51 days, where as my calculations give it a year of 520 days, which seems more reasonable given the distance from its parent star. The database lists the orbitPeriod as 44908900, assuming this figure is meant to represent seconds the formula to work out days is (((orbitPeriod/60)/60)/24). If someone else can confirm this I'll be very grateful. That's the end of my analysis/novel. I hope you have enjoyed it, any and all comments are readily accepted. I can provide my workings spreadsheet on request. Azia Burgi http://azia.geekandproud.co.uk BP Profit Calculator EVE Cemetery
Azia Burgi Caldari Science and Trade Institute	Posted - 2008.01.22 15:34:00 - [2] Originally by: Monty Kvaran I think you could safely expand your gravity tolerance, anywhere from 0.5G to 1.5G or even 2.0G should be reasonably habitable. Also, colder planets would be perfectly habitable (though not necisarily conducive to evolution). I would say anything with an Average Temp >-25C would have at least habitable zones. I'm going to have to disagree on the gravity aspect. While it would well within the realms of the technology of eve to terraform a planet to bring it closer to the atmospheric conditions we enjoy on earth. It's pretty impossible to change the gravity of a planet. There are serious medical conditions to consider. If the gravity is too weak you get tall willowly people with weak bones and poor muscles. If the gravity is too strong you risk premature heart failure and serious injury. If you fall over in 2G (19.6m/s^2) you hit the floor twice as hard. Azia Burgi http://azia.geekandproud.co.uk BP Profit Calculator EVE Cemetery
Azia Burgi Caldari Science and Trade Institute	Posted - 2008.01.22 15:51:00 - [3] more to the point they would weigh twice as much! Azia Burgi http://azia.geekandproud.co.uk BP Profit Calculator EVE Cemetery
Azia Burgi Caldari Science and Trade Institute	Posted - 2008.01.22 16:15:00 - [4] Edited by: Azia Burgi on 22/01/2008 16:15:30 Originally by: Janu Hull Be wary of your orbital period calculations. Planets have been discovered with orbital velocities in excess of four times Earth's in other star systems. It is not beyond conception that extremely short periods are possible for Earthlike planets. The orbit period is listed as 44908900. The only sensible thing i can think this figure means is seconds. if you can get 51 days from that figure in a logical way i am all ears. edit: grammar Azia Burgi http://azia.geekandproud.co.uk BP Profit Calculator EVE Cemetery
Azia Burgi Caldari Science and Trade Institute	Posted - 2008.01.22 17:21:00 - [5] I've just pulled up the figures for the racial homeworlds. Makes for interesting viewing. It also makes you wonder how the races survived the collapse of the Eve Gate. http://azia.geekandproud.co.uk/stuff/RacialHomeworldData.txt Azia Burgi http://azia.geekandproud.co.uk BP Profit Calculator EVE Cemetery
Azia Burgi Caldari Science and Trade Institute	Posted - 2008.01.22 18:29:00 - [6] Originally by: Janu Hull I came up with 519 days, 18 hours, 41 minutes, 40 seconds. If its tenths of a second as a base measure, then you get 51 days. There is no clear indication as to what the figure in the DB is measured as. Azia Burgi http://azia.geekandproud.co.uk BP Profit Calculator EVE Cemetery
Azia Burgi Caldari Science and Trade Institute	Posted - 2008.01.22 22:33:00 - [7] I admit its possible for people to live on less than ideal worlds with eve's level of technology. What i find surprising is the number of planets that haven't been terraformed. I suppose it is possible that its more energy efficient to just build domes than to change the climate of an entire planet We're struggling to produce enough food for 6 billion people, where do they grow the food for several trillion (or more) people that inhabit the eve universe if there aren't many habitable worlds? If its grown in domes it becomes a matter of space. You need a certain amount of land set aside for crops and livestock. If the inhabitants of eve are living in domed cities is the surface area reserved for crops and the people live underground? either the population of new eden is a lot less than i imagined or there is a massive unseen logistics effort happening from somewhere... Azia Burgi http://azia.geekandproud.co.uk BP Profit Calculator EVE Cemetery

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