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Modification Help / Spacemap Gliese VS Peekcity
« on: September 19, 2008, 03:35:36 PM »Peek City
Peek City is will be an popular city with skycrapers like the Twin Towers, Jetski Trade Center, WDF Center, and random skycrapers.
Progress:
Peek City island - 0%
Jetski City island - 0%
Las Venturas island - 0%
North and southpole - 0%
Gliese581 galaxy
Gliese581 solarsystem is an populair and based on an real planet galaxy. I founded this out, but ReactorWorker creating planets. So there is 12% that this map will be released.
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About Gliese581C
Temperature
Using the measured stellar luminosity of Gliese 581 of 0.013 times that of our Sun, it is possible to calculate Gliese 581 c's effective surface temperature. According to Udry's team, the effective temperature for Gliese 581 c, assuming an albedo (reflectivity) such as Venus' (0.64), would be −3° C/26.6° F, and assuming an Earth-like albedo (0.296), then it would be 40° C/104° F., a range of temperatures which overlaps with the range that water would be liquid at a pressure of 1 atmosphere. However, the effective temperature and actual surface temperature can be very different thanks to the greenhouse properties of the planetary atmosphere: for example, Venus has an effective temperature of 238.9 K, but a surface temperature of 737 K, a difference of almost 500 K. Studies of the habitability of Gliese 581's planets conclude that Gliese 581 c is likely to suffer from a runaway greenhouse effect similar to that found on Venus, as such, is highly unlikely to be habitable. Nevertheless, this runaway greenhouse affect could be prevented by the presence of sufficient cloud cover on the planet's day side. Alternatively, if the surface were covered in ice, the high planetary albedo could reflect enough of the incident sunlight back into space to render the planet too cold for habitability, although this situation is expected to be unstable except for very high albedos greater than about 0.95: release of carbon dioxide by volcanic activity or of water vapor due to heating at the substellar point would trigger a runaway greenhouse effect.
Liquid water
Gliese 581 c is likely to lie outside the habitable zone. No direct evidence has been found for water (an important abundant molecule) to be present, but it is probably not present in the liquid state. Techniques like the one used to measure HD 209458 b may in the future be used to determine the presence of water in the form of vapor in the planet's atmosphere, but only in the rare case of a planet with an orbit aligned so as to transit its star, which Gliese 581 c is not known to do.
http://en.wikipedia.org/wiki/Gliese_581_c
