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Article #412Re: How cool is VL2
From: bradguth
Date: Sat, 21 Apr 2007 05:31
Date: Sat, 21 Apr 2007 05:31
140 lines
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7394 bytes
On Apr 20, 8:32 pm, The Ghost In The Machine <e...@sirius.tg00suus7038.net> wrote: > In sci.physics, Art Deco > <e...@caballista.org> > wrote > on Fri, 20 Apr 2007 08:59:46 -0600 > <200420070859466889%e...@caballista.org>: > > > > > > > The Ghost In The Machine <e...@sirius.tg00suus7038.net> wrote: > > >>In sci.physics, Art Deco > >><e...@caballista.org> > >> wrote > >>on Mon, 16 Apr 2007 14:32:10 -0600 > >><160420071432108538%e...@caballista.org>: > >>> <bradg...@gmail.com> wrote: > > >>>>Obviously the mostly Jewish mainstream status quo is not a very happy > >>>>camper these days, but then not much of anything made their Hitler and > >>>>the likes of their resident LLPOF warlord(GW Bush) a happy camper, > >>>>especially as long as those pesky Muslims were sitting on all of that > >>>>oil. > > >>>>Too bad that VL2 simply isn't as worthy of being as perpetrated cold- > >>>>war cloak and dagger worthy. > > >>> Why are you obsessed with "salt",Brad? > > >>Because of the Moon's sodium tail, presumably; plus, if his hypothesis > >>is correct (I'm not all that hopeful!), we captured it from Sirius about > >>15,000 years back, with far more salt and water than it has now. > > >>http://news.bbc.co.uk/2/hi/science/nature/363105.stm > > > "The tail of sodium gas that streams out for great distances behind the > > Moon has been observed better than ever before." > > > Elemental sodium is not "salt". Braddoesn't understand first-year > > chemistry. > > True, although I'm now wondering where the chlorine is, if there is salt > on the moon. > > > > > "There are less than 50 atoms of sodium per cubic centimetre in the > > atmosphere just above the surface of the Moon," > > The tail is long enough to reach Earthside. If one takes it as being > conical, and the cone has height 9.00 * 10^8 m, radius 1.7 * 10^6 m, > one gets 8.17 * 10^21 m^3, or 4.09 * 10^29 atoms or 678,000 moles > or 15.6 metric tonnes of elemental sodium. > > If one instead takes 3.85 * 10^8 m, one gets 6.68 metric tonnes. > > I don't know what the "lossage" rate might be for this tail, but > assuming uniform density (which is probably not all that accurate > anyway) one does get a few tonnes of material. > > > > > YetGuthrants about "tonnes" of "salt" being removed from the Moon. I > > haven't tried the caluculation but that seems a mite excessive. > > Without a rate (tonnes per year? century? million-year period?) > it's a mite meaningless to me. :-) > > > > > The real challenge when attempting to interpretGuth'sscreeds is > > determining what goofy notion he is trying to support with his maze of > > words and numbers. In this case, I have to agree with your guess; it > > is somehow connected to his obsession with Sirius. > > He has stated such in the past, though I'd have to find it. > Personally, I think the coalescence hypothesis far more > probable; something slammed into us, putting gas and dust > into an elliptical orbit which cooled and eventually formed > into the Moon through agglutination/aggregation. > > Were something to come in from Sirius, it would probably > be spinning at a rather odd angle (like, say, Uranus), > and judging from our spin rates it would probably still be > spinning today, especially if it were captured only 15,000 > years back. Tidal drag isn't that forceful, although > it does cause the Moon's orbit to increase maybe 3.8 cm > per year. I could work out how much it slows the Moon's > rotation (assuming the Moon maintains its 1 rotation per > revolution in a sidereal frame while its orbit balloons > outward). Of course a more quickly rotating Moon might > have more drag... > > The Moon's orbit, however, is rather interesting. It has > an eccentricity of 0.0549 according to Wiki, with perigee > 3.63104 * 10^8 m and apogee 4.05696 * 10^8 m. It is also > inclined 5.145 degrees to the ecliptic. I'll admit to > being naive about the matter but a circular ring appears > to me more probable than an elliptical one. However, > I don't really know. > > I doubt we captured it from Sirius 15,000 years back; the > numbers simply don't add up. The Solar System's escape > velocity at Earth's orbit is about sqrt(2) * 30 km/s = > 42.43 km/s. If the body is lucky, it might pass Earth at > about 12.43 km/s -- which might be just enough to capture > it into a highly elliptical orbit, or it might not (8 * > sqrt(2) = 11.31 km/s), if it passes Earth at very close > range. The Moon's current speed is about 1 km/s, and its > present position would require an orbit expansion of 25.7 > km/year -- far more than the 3.8 cm/year observed today. > (At that rate, a near miss from outside would take 10 > billion years, assuming a linear interpolation, which > isn't quite right but this is all back-of-the-napkin > stuff anyway.) > > -- > #191, ewi...@earthlink.net > Murphy was an optimist. > > -- > Posted via a free Usenet account fromhttp://www.teranews.com- Hide quoted text - > > - Show quoted text - A 4 or 5 solar mass star likely became Sirius B, and in that process of having gone giant red and otherwise postal, all sorts of Sirius stuff (including a few worthy Oort cloud items of icy proto-moons) likely came our way. Lithobraking does absolute wonders as for slowing down and tidal locking a new arrival. More importantly, is to tell us why are you still crossposting any of this into "alt.fan.art-bell, alt.usenet.kooks"? - Brad Guth
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X-Google-Thread: 107d29,b6dd08ffb8cd6995 X-Google-Thread: 10b271,b6dd08ffb8cd6995 X-Google-Thread: f74ae,b6dd08ffb8cd6995 X-Google-Thread: 102f53,6d83b219cc200d61 X-Google-Attributes: gid107d29,gid10b271,gidf74ae,gid102f53,public X-Google-Language: ENGLISH,ASCII-7-bit Path: arc1-ca.pugleaf.net!g2news1.google.com!postnews.google.com!o5g2000hsb.googlegroups.com!not-for-mail From: bradguth@gmail.com Newsgroups: sci.space.history,sci.physics,sci.astro,cam.misc Subject: Re: How cool is VL2 Date: 20 Apr 2007 22:31:29 -0700 Organization: http://groups.google.com Lines: 141 Message-ID: <1177133489.660310.48600@o5g2000hsb.googlegroups.com> References: <943268f4698ce93ff8aabb231b766a9b.49644@mygate.mailgate.org> <36b3d31d22e84eabffde43ab75d37f6b.49644@mygate.mailgate.org> <ejfaf4-rhd.ln1@sirius.tg00suus7038.net> <1176673754.266358.28920@o5g2000hsb.googlegroups.com> <sgkaf4-57e.ln1@sirius.tg00suus7038.net> <1176726724.039256.165400@o5g2000hsb.googlegroups.com> <1176748038.681488.257900@b75g2000hsg.googlegroups.com> <160420071432108538%erfc@caballista.org> <ke1mf4-dd6.ln1@sirius.tg00suus7038.net> <200420070859466889%erfc@caballista.org> <b7dof4-otq.ln1@sirius.tg00suus7038.net> NNTP-Posting-Host: 64.91.99.6 Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" X-Trace: posting.google.com 1177133490 30694 127.0.0.1 (21 Apr 2007 05:31:30 GMT) X-Complaints-To: groups-abuse@google.com NNTP-Posting-Date: Sat, 21 Apr 2007 05:31:30 +0000 (UTC) In-Reply-To: <b7dof4-otq.ln1@sirius.tg00suus7038.net> User-Agent: G2/1.0 X-HTTP-UserAgent: Mozilla/4.0 (compatible; MSIE 6.0; MSN 2.5; Windows 98; T312461),gzip(gfe),gzip(gfe) Complaints-To: groups-abuse@google.com Injection-Info: o5g2000hsb.googlegroups.com; posting-host=64.91.99.6; posting-account=zEXP4w0AAAAJ5s7atsfc5JlL--hpDELy