Nyrath Posted January 6, 2010 Report Share Posted January 6, 2010 http://www.centauri-dreams.org/?p=10934 New astronomical data suggests that solar systems like ours are only found in 1 in ten stars. I find this to be very undramatic, and am going to ignore this result for my campaigns. Quote Link to comment Share on other sites More sharing options...
RexMundi Posted January 6, 2010 Report Share Posted January 6, 2010 Re: Solar Systems Like Ours in the Minority Well even if it's 1 in 10, that's Still very much within Carl Sagan's trademark Billions and Billions correct? ~Rex Quote Link to comment Share on other sites More sharing options...
austenandrews Posted January 6, 2010 Report Share Posted January 6, 2010 Re: Solar Systems Like Ours in the Minority That's kind of what I figured all along. If someone had said the majority were like ours, I would have been surprised. Quote Link to comment Share on other sites More sharing options...
Xavier Onassiss Posted January 6, 2010 Report Share Posted January 6, 2010 Re: Solar Systems Like Ours in the Minority Given a typical distribution of stars, what would the average distance between "Sol-type" systems be, with this result? Don't look at me, Xavier Onassiss Quote Link to comment Share on other sites More sharing options...
RexMundi Posted January 6, 2010 Report Share Posted January 6, 2010 Re: Solar Systems Like Ours in the Minority Sol-Type Systems I think would be a better term. That little Rat bugger type of star is all over the place. Still, if the math says 1 in 10, then you can simply multiply the distance by 10 and one should be good. Or is it a factor of 10? My experience is more practical then analytical, so if a math nerd wants to fess up the correct answer I'll nod my head in a Sage like manner and agree with the proper harrumphing and pipe smoking. ~Rex Quote Link to comment Share on other sites More sharing options...
L. Marcus Posted January 6, 2010 Report Share Posted January 6, 2010 Re: Solar Systems Like Ours in the Minority ... The distance between Sol-like systems should be adjusted by the cube root of ten -- that's two and a bit. Quote Link to comment Share on other sites More sharing options...
RexMundi Posted January 6, 2010 Report Share Posted January 6, 2010 Re: Solar Systems Like Ours in the Minority *Nods head, puffs on the pipe.....harrumphs and repeats with a few of course of course's tossed in for good measure* ~Rex.....steps back and waits for battle of the math Brains to commence, and for someone to explain Why the Cube Root? Quote Link to comment Share on other sites More sharing options...
L. Marcus Posted January 6, 2010 Report Share Posted January 6, 2010 Re: Solar Systems Like Ours in the Minority Say that in a given space there's one thousand stars. Now remove nine out of ten stars -- then each star left has ten times the volume it originally had. If we say that this space is in the shape of a cube, then the length of each side is the cube root of the volume. Since the star's original volume was ten times smaller, the length of one of the sides gets longer by a factor of the cube root of ten. Was that readable? Quote Link to comment Share on other sites More sharing options...
RexMundi Posted January 6, 2010 Report Share Posted January 6, 2010 Re: Solar Systems Like Ours in the Minority Ah.....Always nice when a Math guy can speak to us lower primates. I can actually wrap what's left of my brain around that. ~Rex Quote Link to comment Share on other sites More sharing options...
L. Marcus Posted January 6, 2010 Report Share Posted January 6, 2010 Re: Solar Systems Like Ours in the Minority Goodness, no! I'm no math guy -- I'm a medical man. Quote Link to comment Share on other sites More sharing options...
Cancer Posted January 6, 2010 Report Share Posted January 6, 2010 Re: Solar Systems Like Ours in the Minority I.e., he's a professional at messing around inside people's heads. Quote Link to comment Share on other sites More sharing options...
L. Marcus Posted January 6, 2010 Report Share Posted January 6, 2010 Re: Solar Systems Like Ours in the Minority ... And putting things right, hopefully. ^^ Quote Link to comment Share on other sites More sharing options...
RexMundi Posted January 6, 2010 Report Share Posted January 6, 2010 Re: Solar Systems Like Ours in the Minority Yeah I work in construction though. My math, is strictly limited to Square Footage, Square Yardage, and Cubic Footage and Yardage. You get me out of that arena and I can barely do 2+2 anymore. ~Rex Quote Link to comment Share on other sites More sharing options...
Kristopher Posted January 6, 2010 Report Share Posted January 6, 2010 Re: Solar Systems Like Ours in the Minority That's a very good estimate to know. So how big of a volume around Sol should it take to find, say, 1000 Sol-type systems? Quote Link to comment Share on other sites More sharing options...
L. Marcus Posted January 6, 2010 Report Share Posted January 6, 2010 Re: Solar Systems Like Ours in the Minority ... I think the average distance between stars locally is nine light years. Say one tenth of those are brighter than a M-class star (F, G, and K classes, mainly). And one tenth of those has Sol-class systems. Then nine light years times the cube root of one hundred is the average distance we're looking for -- something like forty light years. For a thousand systems, the length of the cube's side is then ten times that -- four hundred light years, or something like the thickness of the galactic disc locally. All numbers off the top of my head, natch. Quote Link to comment Share on other sites More sharing options...
RexMundi Posted January 6, 2010 Report Share Posted January 6, 2010 Re: Solar Systems Like Ours in the Minority *Gets to work moving his Planets and Wormhole connections around a bit for his current campaign*..... Information.....a Dangerous thing indeed. ~Rex Quote Link to comment Share on other sites More sharing options...
Cancer Posted January 6, 2010 Report Share Posted January 6, 2010 Re: Solar Systems Like Ours in the Minority The thickness of the galactic disk depends on the age of the population you are studying: the older, the thicker. Quote Link to comment Share on other sites More sharing options...
austenandrews Posted January 6, 2010 Report Share Posted January 6, 2010 Re: Solar Systems Like Ours in the Minority The thickness of the galactic disk depends on the age of the population you are studying: the older' date=' the thicker.[/quote'] Ain't that the truth, brother. Quote Link to comment Share on other sites More sharing options...
RexMundi Posted January 6, 2010 Report Share Posted January 6, 2010 Re: Solar Systems Like Ours in the Minority Would Older be moving Faster or Slower in terms of Galactic movement? ~Rex Quote Link to comment Share on other sites More sharing options...
L. Marcus Posted January 6, 2010 Report Share Posted January 6, 2010 Re: Solar Systems Like Ours in the Minority Slower, and leave the turn signal on. Quote Link to comment Share on other sites More sharing options...
Cancer Posted January 6, 2010 Report Share Posted January 6, 2010 Re: Solar Systems Like Ours in the Minority Older populations tend to have larger velocity components perpendicular to the plane. Velocities within the plane is ... less straightforward. Quote Link to comment Share on other sites More sharing options...
Clonus Posted January 6, 2010 Report Share Posted January 6, 2010 Re: Solar Systems Like Ours in the Minority http://www.centauri-dreams.org/?p=10934 New astronomical data suggests that solar systems like ours are only found in 1 in ten stars. I find this to be very undramatic, and am going to ignore this result for my campaigns. Bear in mind that's "like ours" in that they have gas giants at the edge of the system. Like ours in that they have reasonably large rocky bodies in the warm zone is an open question. Also of course, I bet the bigger stars (and ours is one of the bigger stars) are more likely to have gas giants. Quote Link to comment Share on other sites More sharing options...
RexMundi Posted January 6, 2010 Report Share Posted January 6, 2010 Re: Solar Systems Like Ours in the Minority Which is a good point to make, since the Gas Giants at the outer edge, tend to work like solar system vacuum cleaners. ~Rex Quote Link to comment Share on other sites More sharing options...
Nyrath Posted January 6, 2010 Author Report Share Posted January 6, 2010 Re: Solar Systems Like Ours in the Minority Well even if it's 1 in 10' date=' that's Still very much within Carl Sagan's trademark Billions and Billions correct?[/quote'] Yes. Latest estimates I've seen say 200 to 400 billion stars in our galaxy, which means 20 to 40 billion solar systems Quote Link to comment Share on other sites More sharing options...
L. Marcus Posted January 6, 2010 Report Share Posted January 6, 2010 Re: Solar Systems Like Ours in the Minority ... Anyone want to guess at the likelihood of planetary systems forming in the galactic core? That holds, what, ninety percent of all stars? Quote Link to comment Share on other sites More sharing options...
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