Re: Habitable Planets: was Notes on Uplift

2004-01-11 Thread Alberto Monteiro
Trent Shipley wrote: > > > Ok. But it's better to go back and set the Drake factors based on what > > we want to get in the end. > > Excellent idea! > And then we can get back and estimate how many planets developed pre-sentient life _before_ the Progenitors came and destroyed their own planets cau

Re: Habitable Planets: was Notes on Uplift

2004-01-10 Thread Trent Shipley
On Friday 2004-01-09 05:34, Alberto Monteiro wrote: > Trent Shipley wrote: > >>> If there are 2M inhabited planets then there are 14M fallow planets. > >>> At any given time there must be a total of 16M habitable planets. > >> > >> Ok, 700ky, or 1My, don't change the final numbers very much > > >

Re: Habitable Planets: was Notes on Uplift

2004-01-09 Thread Ronn!Blankenship
At 06:37 AM 1/9/04, Alberto Monteiro wrote: Ronn!Blankenship wrote: > >> But Asimov was optimist about the existence of habitable planets, we >> know for sure that there can't be habitable planets around, for >> example, Epsilon Eridani, where Asimov placed Baleyworld-Comporellon. > > We do? > Does

Re: Habitable Planets: was Notes on Uplift

2004-01-09 Thread Alberto Monteiro
Ronn!Blankenship wrote: > >> But Asimov was optimist about the existence of habitable planets, we >> know for sure that there can't be habitable planets around, for >> example, Epsilon Eridani, where Asimov placed Baleyworld-Comporellon. > > We do? > Doesn't Epsilon Eridani have a hot-Jupiter orbit

Re: Habitable Planets: was Notes on Uplift

2004-01-09 Thread Alberto Monteiro
Trent Shipley wrote: > >>> >>> If there are 2M inhabited planets then there are 14M fallow planets. >>> At any given time there must be a total of 16M habitable planets. >> >> Ok, 700ky, or 1My, don't change the final numbers very much > > Nope. > > Look. I want to write about Clan Tothtoon. To

Re: Habitable Planets: was Notes on Uplift

2004-01-09 Thread Ronn!Blankenship
At 12:13 AM 1/9/04, Trent Shipley wrote: > > As a side note, Asimov's Galactic Empire includes 25M planets in a > single Galaxy, all of them terraformed in the past 22,000 years. But > Asimov was optimist about the existence of habitable planets, we > know for sure that there can't be habitable pla

Re: Habitable Planets: was Notes on Uplift

2004-01-08 Thread Trent Shipley
On Thursday 2004-01-08 06:00, Alberto Monteiro wrote: > Trent Shipley wrote: > >> No. I propose that there are 2M planets _with_ galactic > >> civilization settled on them. But they could be 20M or 200k. > > > > Good. So 2M is a _reasonable_ statistical expectiation for planets that > > could supp

Re: Habitable Planets: was Notes on Uplift

2004-01-08 Thread Alberto Monteiro
Trent Shipley wrote: > >> No. I propose that there are 2M planets _with_ galactic >> civilization settled on them. But they could be 20M or 200k. > > Good. So 2M is a _reasonable_ statistical expectiation for planets that > could support civilzation across 5 galaxies. > As a side note, Asimov's Ga

Re: Habitable Planets: was Notes on Uplift

2004-01-07 Thread Ronn!Blankenship
Perhaps of interest: Donald Savage Headquarters, WashingtonJanuary 7, 2004 (Phone: 202/358-1727) Steve Roy Marshall Space Flight Center, Huntsville, Ala. (Phone: 256/544-6535) Megan Watzke Chandra X-ray Observatory Center, Cambridge, Mass. (Phone: 617/496-7998) RELEASE: 04-013

Habitable Planets: was Notes on Uplift

2004-01-07 Thread Trent Shipley
On Wednesday 2003-12-24 06:22, Alberto Monteiro wrote: > Trent Shipley wrote: > >> My estimate includes all five. Of course, as in Drake's equation, > >> each factor has an error from 10% to 900% :-) > >> > * about 10 planets per race > * about 200,000 races > > > > Alberto, as I recall D