grumble at wolfe comment made attached to guardianarticle

David Stockhoff · 09 Feb 2011, 12:32 · from 2011-February.txt.gz

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From: dstockhoff at verizon.net (David Stockhoff)
Date: Wed, 09 Feb 2011 07:32:12 -0500
Subject: (urth) grumble at wolfe comment made attached to guardianarticle
In-Reply-To: <4D52272C.3010600 at io.com>
References: <SNT123-W400DB386713A3D18B7614CCFEA0 at phx.gbl><4D51DA82.6010103 at verizon.net><AANLkTimQ4=4ST=cMrEf_kvvVJP7=ygPS1U=iBpDCBthx at mail.gmail.com><1D98E2C398854830BEB19325EE3A27DE@jill>	<AANLkTik4G0iA_uaY4w4WigfOjqcrMi0DD1Aeny0Bxf3E at mail.gmail.com>	<8AC6534E159C45C9B82792E595D233FD@jill>
	<4D52272C.3010600 at io.com>
Message-ID: <4D52894C.6030604 at verizon.net>

Stunning.

So in the case of the asteroid and Earth, it's not that the asteroid 
turns around, but that it falls behind until Earth catches it. Damn.

105,000 miles is still dangerously close, but this scheme gets the 
planets closer than a 6/7 orbital distance would.

On 2/9/2011 12:33 AM, Jeff Wilson wrote:
> On 2/8/2011 9:36 PM, Gerry Quinn wrote:
>> I forgot about that.
>> But one or both could have an elliptical orbit.
>> Again, I don't know whether precession would make this unrealistic or
>> not. And 35000 leagues is incredibly, dangerously close for two
>> Earth-sized planets.
>> But in terms of basic mechanics, a series of conjunctions should be
>> possible (for story purposes, I think it would probably be sufficient if
>> the series lasted a few centuries).
>
> They could be paired in a horseshoe orbit:
>
> http://curious.astro.cornell.edu/question.php?number=210
>


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