Recent Changes for "Star and System Design" - SF Journey Creations

Star and System Design

Douglas.E — 2008-01-05 21:04:59

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- This game has a large database of stars and their data. This data is generated using a random star and star system generator based on known probabilities of stars and planets and other orbiting bodies.	+ This game has a large database of stars and their data. This data is generated using a torus filled with high contrast Perlin noise star positions and a star system generator based on known probabilities of stars and planets and other orbiting bodies in the area of Sol. The stars are in very large open cluster numbering about 28,000 objects in total. The open cluster is believed to have evolved from a smoke ring shaped nebula. +

Star and System Design

Douglas.E — 2007-12-21 22:58:41

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- Star Dist. (pc)	+
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	+ Luminosity 1 (sol L) + Mass (sol mass)
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- Star Mass (sol mass)
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- Luminosity 1 (sol L)

Star and System Design

Douglas.E — 2007-12-19 13:15:28

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	+ id \| owner_id \| owner_read \| owner_write \| group_id \| group_read \| group_write \| other_read \| other_write \| star_name \| short_description \| long_description \| picture \| orbital_degrees \| orbital_radius \| orbital_speed \| x \| y \| z \| spectral_class \| spectral_subclass \| star_size \| bolometric_magnitude \| luminosity \| effective_temperatures \| mass \| radii \| inner_habitable_zone \| outer_habitable_zone \| number_of_planets \| planet_id \| number_of_objects_in_orbit \| objects_id \| number_of_animals \| animals \| number_of_plants \| plants + +

Star and System Design

Douglas.E — 2007-12-18 16:54:17

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	+ Last ship to vist + Date of last vist. + Average number of visits per week.

Star and System Design

Douglas.E — 2007-12-16 11:25:03

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	+ Tidal locking Outer Radius (AU)
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	+ Tidal locking Outer Radius (AU)

Star and System Design

Douglas.E — 2007-12-16 11:21:11

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-	+ Here is a great link to info about making systems by Tyge Sjostrand . I am sure we can use most of it. + http://www.trisen.com/sol/static/wg/wg.html

Star and System Design

Douglas.E — 2007-12-15 14:51:55

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	+ X + Y + Z

Star and System Design

Douglas.E — 2007-12-15 14:50:06

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	+ list of possible jump to systems + dates and times each jump system last changed state + list of active jump to systems

Star and System Design

Douglas.E — 2007-12-15 13:57:25

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- Star name	+ Star Name + Number Of Companions. + List of companion IDs
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	+ Temperature
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- Apparent Mag. V	+ Absolute Magnitude
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	+ Jump Out Distance + Jump In Distance

Star and System Design

Douglas.E — 2007-12-15 13:27:19

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- Player Owner - Access Rights - GM Owner - Access Rights	+ Game Master (default sysop) + Game Master Group + Game Master Other + Player (default sysop) + Player Group + Player Other
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	+ Game Master (default sysop) + Game Master Group + Game Master Other + Player (default none) + Player Group + Player Other
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	+ Planet Surface Gravity + Planet Percent Water
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	+

Star and System Design

Douglas.E — 2007-12-15 13:23:26

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	+ ID + Player Owner + Access Rights + GM Owner + Access Rights
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	+ ID

Star and System Design

Douglas.E — 2007-12-15 13:21:23

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	+ Number of objects (planets) in primary orbit + list of pointers to (objects) planets
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- -	+ Orbit of Greatest Opp. (AU) + Planet Start Category + Planet's Residency in Habitable Zone (Gyr) + Number of objects (planets) in primary orbit + list of pointers to (objects) planets

Star and System Design

Douglas.E — 2007-12-15 13:16:57

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- Info in the Star data base entry:	+ + + '''Info in the Star data base entry:'''
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- Star Dist. - (pc) SpectralType	+ Star Dist. (pc) + Spectral Type
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- Luminosity 1 - (sol L)	+ Luminosity 1 (sol L) + Main Sequence Duration (Gyr)
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- Info in the Planet data base entry:	+ '''Info in the Planet data base entry:'''

Star and System Design

Douglas.E — 2007-12-15 13:11:59

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- ===Info in the Star data base entry:===	+ Info in the Star data base entry:
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- ===Info in the Planet data base entry:===	+ Info in the Planet data base entry:

Star and System Design

Douglas.E — 2007-12-15 13:10:41

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	+ + ===Info in the Star data base entry:=== + Star name + Star Dist. + (pc) SpectralType + Metallicity + Star Mass (sol mass) + Apparent Mag. V + Luminosity 1 + (sol L) + HabZone Inner Radius (AU) + HabZone Outer Radius (AU) + + ===Info in the Planet data base entry:=== + Planet Name + Planet Mass (J mass) + Planet Semi axis (AU) + Orbital Ecc. + Orbital Period (sidereal days) + +

Star and System Design

Douglas.E — 2007-12-14 19:13:47

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- - - - -
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- - -
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Star and System Design

Douglas.E — 2007-12-14 19:10:34

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	+ + This bit is from a web site http://www.solstation.com/habitable.htm but is very relevant for the design of our system generator. + + == Possibly Suitable Stars == + + The range of star types that can support Earth-type life on planets may be limited to those lower mass stars that "live" long enough as stable luminous stars for planets to form and complex life to evolve. Although all main sequence stars generate luminous energy by converting hydrogen into helium through thermonuclear fusion, stars more massive than 1.5 times that of Sol (i.e., stars of spectral type O, B, or A dwarfs like Sirius) age too quickly to support the development of complex Earth-type life. Even the largest, possibly suitable stars -- i.e., spectral type F0-4 (Kasting et al, 1993; abstract) -- may only be able to support Earth-type life for around two billion years, and so planets in favorable orbits may not have sufficient time to develop complex life on land such as trees. Moreover, within a couple of billion years of a star's birth, cometary and asteroidal bombardment may still be so intense that living on such planets would be quite risky. + + + + + + + NASA Observatorium + + + + + See a discussion of + the "main sequence" + as part of stellar + evolution and death. + + + On the opposite extreme, stars with less than half of Sol's mass (e.g., smaller spectral type M dwarfs like Proxima Centauri) are more likely to tidally lock planets that are orbiting close enough to have liquid water on their surface too quickly, before life can develop (Peale, 1977). Tidally locking (or synchronous rotation of the star and planet) may eventually cause the destruction of a life-sustaining atmosphere through condensation on the cold, perpetually dark side of the planet. Moreover, most M-type red dwarf stars would tend to sterilize life on a close-orbiting Earth-type planet regularly with large stellar flares. Therefore, NASA's proposed Kepler Mission will search for habitable planets at nearby main sequence stars that are less massive than spectral type A but more massive than type M -- dwarf stars of types F, G, and K. However, since low-mass M- and K-type stars so numerous, some astronomers and planetary scientists are continuing to model low-mass stars and possible planetary environments that may be potentially suitable for Earth-type plant and animal life, as well as for microbes (Helmut Hammer, 2007; Tarter et al, 2007; Scalo et al, 2007; Khodachenko et al, 2007; and Grenfell et al, 2007; and Kiang et al, 2007).

Star and System Design

Douglas.E — 2007-12-14 19:03:09

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	+ Here is the math do calculate the habitable zone. Only planets in the HZ will have randomly generated life forms, others must me placed by the Game masters. http://en.wikipedia.org/wiki/Habitable_zone

Star and System Design

Douglas.E — 2007-12-14 18:40:37

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- [[Image(H-R_diagram_-edited-3.gif, right, 600, thumbnail, "This file is licensed under the Creative Commons Attribution ShareAlike 2.5 License. In short: you are free to share and make derivative works of the file under the conditions that you appropriately attribute it, and that you distribute it only under a license identical to this one. Official license")]]	+ [[Image(H-R_diagram_-edited-3.gif, right, 600, thumbnail, "This file is licensed under the Creative Commons Attribution ShareAlike 2.5 License. In short: you are free to share and make derivative works of the file under the conditions that you appropriately attribute it, and that you distribute it only under a license identical to this one. Taken from Wikipedia, stars")]] + + This game has a large database of stars and their data. This data is generated using a random star and star system generator based on known probabilities of stars and planets and other orbiting bodies.

Star and System Design

Douglas.E — 2007-12-14 18:38:12

Differences for Star and System Design

No differences found!

Star and System Design

Douglas.E — 2007-12-14 18:37:55

Upload of image H-R_diagram_-edited-3.gif.

Star and System Design

Douglas.E — 2007-12-14 18:37:39

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- Describe Star and System Design here. - "H-R_diagram_-edited-3.gif"	+ = Star and System Design = + [[Image(H-R_diagram_-edited-3.gif, right, 600, thumbnail, "This file is licensed under the Creative Commons Attribution ShareAlike 2.5 License. In short: you are free to share and make derivative works of the file under the conditions that you appropriately attribute it, and that you distribute it only under a license identical to this one. Official license")]]

Star and System Design

Douglas.E — 2007-12-14 18:35:26

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	+ Describe Star and System Design here. + "H-R_diagram_-edited-3.gif"