From lojban+bncCNTPpI2KGxCHoaHiBBoE2dIgIg@googlegroups.com Thu Jul 22 07:07:28 2010 Received: from mail-gw0-f61.google.com ([74.125.83.61]) by chain.digitalkingdom.org with esmtp (Exim 4.72) (envelope-from ) id 1ObwQh-00032o-UZ; Thu, 22 Jul 2010 07:07:27 -0700 Received: by gwj18 with SMTP id 18sf211426gwj.16 for ; Thu, 22 Jul 2010 07:07:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlegroups.com; s=beta; h=domainkey-signature:received:x-beenthere:received:received:received :received:received-spf:x-authority-analysis:x-cloudmark-score :x-originating-ip:received:received:from:to:subject:date:user-agent :references:in-reply-to:mime-version:message-id:x-original-sender :x-original-authentication-results:reply-to:precedence:mailing-list :list-id:list-post:list-help:list-archive:sender:list-subscribe :list-unsubscribe:content-type:content-transfer-encoding :content-disposition; bh=Xocb9BJ4cfqpXzWNEDavAV8l+EPnrEuQ1lGKd0UXUPg=; b=bof8I1shUaWMIPywYcgs4rsawQp6t6OqGyX34Fr8sdxiu1fNFNyx5X7uB2JEdjV2Yr KqGyqQXwU+RWIGkWZpBxRjlMcWd8o2EQYnmApn6i5Tg3bMDPxwoWG/XVbwzJnu7jny6g it7eOYj18dMWgHKnR5pGKnNz60A4Hg1hnSSHY= DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlegroups.com; s=beta; h=x-beenthere:received-spf:x-authority-analysis:x-cloudmark-score :x-originating-ip:from:to:subject:date:user-agent:references :in-reply-to:mime-version:message-id:x-original-sender :x-original-authentication-results:reply-to:precedence:mailing-list :list-id:list-post:list-help:list-archive:sender:list-subscribe :list-unsubscribe:content-type:content-transfer-encoding :content-disposition; b=eEj/RZJmap4ZIBFFe9KUdJPOHQI8SdWLPtDWfMOTitvpy8Lzvp4zLB0OmDZQ2DJGlC P2aourzxvYiWIMs+ZGzIJdoOstmfZbhyDvNWl9Ilhh9okeDqUkWqw7Kkz0EbaGM38uge SSHxEkSubhoHrJ13H/7kiCKY6L0bnEnqDBawY= Received: by 10.90.88.16 with SMTP id l16mr710341agb.43.1279807623811; Thu, 22 Jul 2010 07:07:03 -0700 (PDT) X-BeenThere: lojban@googlegroups.com Received: by 10.231.149.4 with SMTP id r4ls23875ibv.2.p; Thu, 22 Jul 2010 07:07:02 -0700 (PDT) Received: by 10.231.19.205 with SMTP id c13mr246401ibb.13.1279807622801; Thu, 22 Jul 2010 07:07:02 -0700 (PDT) Received: by 10.231.19.205 with SMTP id c13mr246400ibb.13.1279807622778; Thu, 22 Jul 2010 07:07:02 -0700 (PDT) Received: from cdptpa-omtalb.mail.rr.com (cdptpa-omtalb.mail.rr.com [75.180.132.120]) by gmr-mx.google.com with ESMTP id e25si6271656ibk.7.2010.07.22.07.07.02; Thu, 22 Jul 2010 07:07:02 -0700 (PDT) Received-SPF: neutral (google.com: 75.180.132.120 is neither permitted nor denied by best guess record for domain of phma@phma.optus.nu) client-ip=75.180.132.120; X-Authority-Analysis: v=1.0 c=1 a=f3wYcKxqQrgA:10 a=ORa4HqFjfvEA:10 a=8nJEP1OIZ-IA:10 a=joYBHvGNByTijHB3VegA:9 a=kVsbJUdJrk9ez13iWosA:7 a=pfi9R6PE6nOeMVie40XBm35syS0A:4 a=wPNLvfGTeEIA:10 X-Cloudmark-Score: 0 X-Originating-IP: 71.71.198.100 Received: from [71.71.198.100] ([71.71.198.100:59000] helo=chausie) by cdptpa-oedge01.mail.rr.com (envelope-from ) (ecelerity 2.2.2.39 r()) with ESMTP id 32/9D-03451-580584C4; Thu, 22 Jul 2010 14:07:02 +0000 Received: from localhost (localhost [127.0.0.1]) by chausie (Postfix) with ESMTP id 84B7410D7E for ; Thu, 22 Jul 2010 10:06:59 -0400 (EDT) From: Pierre Abbat To: lojban@googlegroups.com Subject: Re: [lojban] Re: Lojban Kids Show - location Date: Thu, 22 Jul 2010 10:06:51 -0400 User-Agent: KMail/1.9.6 (enterprise 0.20070907.709405) References: <3c4ace6b-a18e-4306-a2b1-8cef523e20f3@u36g2000prg.googlegroups.com> <201007212131.13536.phma@phma.optus.nu> <76704117-8645-4053-A5DA-B4A2C77A11F6@cosmicray.co.uk> In-Reply-To: <76704117-8645-4053-A5DA-B4A2C77A11F6@cosmicray.co.uk> MIME-Version: 1.0 Message-Id: <201007221006.55361.phma@phma.optus.nu> X-Original-Sender: phma@phma.optus.nu X-Original-Authentication-Results: gmr-mx.google.com; spf=neutral (google.com: 75.180.132.120 is neither permitted nor denied by best guess record for domain of phma@phma.optus.nu) smtp.mail=phma@phma.optus.nu Reply-To: lojban@googlegroups.com Precedence: list Mailing-list: list lojban@googlegroups.com; contact lojban+owners@googlegroups.com List-ID: List-Post: , List-Help: , List-Archive: Sender: lojban@googlegroups.com List-Subscribe: , List-Unsubscribe: , Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Thursday 22 July 2010 08:22:09 CosmicRay wrote: > OK we've had two compelling votes to place Lojgugde at Earth-Moon L4/L5, > which for all practical reasons are ideal. Can anyone tell me how > frequently and for how long Lojgugde at one of these points may be in > Earth's or the Moon's shadow? The Moon's orbital period is ~27 days and = is > off Earth's equatorial axis by ~5=B0. Lojgugde would be in the Earth's shadow as often as the Moon is eclipsed,= =20 which is about twice a year, and in the Moon's shadow as often as an eclips= e=20 of the Sun passes through the middle of the Earth, which is somewhat less= =20 often. (There may be five solar eclipses in a year, but they pass over=20 different parts of the Earth.) Both occur when the Sun passes through the= =20 plane of the Moon's orbit. L4 is eclipsed by the Moon 1/6 through a lunatio= n=20 (starting at the dark, not new, moon) and by the Earth 1/3 through a=20 lunation. L5 is eclipsed by the Earth 2/3 through a lunation and by the Moo= n=20 5/6 through a lunation. > From the story's perspective it's less ideal; placing the station at thos= e > points would make it visible to the naked eye at certain times. When the > station is just past parallel to, through to behind the Earth (relative t= o > the Sun) and back again, the spinning mirrors would glint, causing a > pinpoint of flashing light in the sky with a frequency of about 30 second= s. > For a little under half its orbital period the flash may be visible from > Earth at dawn and dusk and would certainly be easy to see at night. The mirrors are aimed to reflect sunlight into the station's windows and on= to=20 the opposite land. They wouldn't be visible from Earth. Other surfaces of t= he=20 station could be covered with matte solar panels or some such. By the way, how did you get a line beginning "From " past the mail server= =20 without it adding a greater-than sign? Pierre --=20 Jews use a lunisolar calendar; Muslims use a solely lunar calendar. --=20 You received this message because you are subscribed to the Google Groups "= lojban" group. To post to this group, send email to lojban@googlegroups.com. To unsubscribe from this group, send email to lojban+unsubscribe@googlegrou= ps.com. For more options, visit this group at http://groups.google.com/group/lojban= ?hl=3Den.