|
|
Thread Tools | Display Modes |
#21
|
|||
|
|||
Ian Stirling wrote in message news:41601991$0$17957
Google "how the moon was formed". Thanks Ian. The first hit gives me this link, which is very interesting:- http://csep10.phys.utk.edu/astr161/l...formation.html Here they list 5 possible ways the Moon could have formed:- 1. The Fission Theory: The Moon was once part of the Earth and somehow separated from the Earth early in the history of the Solar System. The present Pacific Ocean basin is the most popular site for the part of the Earth from which the Moon came. 2. The Capture Theory: The Moon was formed somewhere else, and was later captured by the gravitational field of the Earth. 3. The Condensation Theory: The Moon and the Earth condensed together from the original nebula that formed the Solar System. 4. The Colliding Planetesimals Theory: The interaction of earth-orbiting and Sun-orbiting planetesimals (very large chunks of rocks like asteroids) early in the history of the Solar System led to their breakup. The Moon condensed from this debris. 5. The Ejected Ring Theory: A planetesimal the size of Mars struck the earth, ejecting large volumes of matter. A disk of orbiting material was formed, and this matter eventually condensed to form the Moon in orbit around the Earth. Apparently, in that web article, the fifth hypo (Ejected Ring Theory) is the *most* favoured. On a first thought, I personally find that to be the LEAST likely. It just does not 'fit', somehow... Anyone have any other preferences? Abdul |
#22
|
|||
|
|||
In article ,
"Christopher M. Jones" wrote: Herb Schaltegger wrote: See, e.g., http://www.ncbi.nlm.nih.gov/entrez/q...PubMed&dbFrom= PubMed&from_uid=14664724 This is just nonsense. There is no phase relationship between the lunar cycle and menstruation. If there were any causal relationship it would follow some pattern rather than being completely non-correlated. Also, the period of a women's menstrual cycle is not even remotely the same as that of the lunar cycle. The average is off by at least a day (for either synodic or sidereal period), not to mention the fact that the menstrual cycle can vary by several days. Additionally, there is much wider variation in menstrual cycles across different species, if something like the moon were effecting the process there wouldn't be such high variation. Actually, there is a statistical correlation - it just isn't perfect. Read the article abstracts if not the articles themselves. There is about a 30% correlation between lunar phase and menstruation, much higher than can be explained by other factors. And it's not just menstruation. Ask anyone who works in a crisis monitoring center, an ER or a birthing center at a decent-sized hospital how the phases of the moon affect their work. I can't believe I'm even responding to something so inane. The obsolete term for acting irrationally is "lunacy' after all. Just because you don't believe in something proven statistically doesn't make it inane. It might, however, make you closed-minded. -- Herb Schaltegger, B.S., J.D. "Never underestimate the power of human stupidity." ~ Robert A. Heinlein http://www.angryherb.net |
#23
|
|||
|
|||
"Herb Schaltegger" wrote in message ... And it's not just menstruation. Ask anyone who works in a crisis monitoring center, an ER or a birthing center at a decent-sized hospital how the phases of the moon affect their work. And look at the second article listed there which showed zero correlation between lunar cycles and crisis call centers. As for women's menstrual cycles, why only humans and not all mammals? And why 28 days when millions of years ago the moon's period was different? I can't believe I'm even responding to something so inane. The obsolete term for acting irrationally is "lunacy' after all. Just because you don't believe in something proven statistically doesn't make it inane. It might, however, make you closed-minded. -- Herb Schaltegger, B.S., J.D. "Never underestimate the power of human stupidity." ~ Robert A. Heinlein http://www.angryherb.net |
#24
|
|||
|
|||
"Herb Schaltegger" wrote in message
news:herb.schaltegger- And it's not just menstruation. Ask anyone who works in a crisis monitoring center, an ER or a birthing center at a decent-sized hospital how the phases of the moon affect their work. I have heard that in tight social groupings, menstruations fall into phase with the alpha female, do not ask me how that works. Though it might promote monogamy and encourage all the men to go off hunting once a month. Hunting, fishing, etc., is effected by the moon... Also, in the old days, a full moon enabled a degree of nocturnal behaviour. Conceivably, all sorts of weird moon related evolutionary mechanisms might occur, it beats me. Pete. |
#25
|
|||
|
|||
Greg D. Moore (Strider) wrote:
"Herb Schaltegger" wrote in message ... And it's not just menstruation. Ask anyone who works in a crisis monitoring center, an ER or a birthing center at a decent-sized hospital how the phases of the moon affect their work. And look at the second article listed there which showed zero correlation between lunar cycles and crisis call centers. See also: http://skepdic.com/fullmoon.html Paul |
#26
|
|||
|
|||
On Tue, 5 Oct 2004 01:53:01 +1300, in a place far, far away, "Pete
Lynn" made the phosphor on my monitor glow in such a way as to indicate that: "Herb Schaltegger" wrote in message news:herb.schaltegger- And it's not just menstruation. Ask anyone who works in a crisis monitoring center, an ER or a birthing center at a decent-sized hospital how the phases of the moon affect their work. I have heard that in tight social groupings, menstruations fall into phase with the alpha female, do not ask me how that works. Almost certainly via pheremones (though I'm not sure that they follow any particular female--they just all tend to synch together). |
#27
|
|||
|
|||
In article ,
"Pete Lynn" wrote: I have heard that in tight social groupings, menstruations fall into phase with the alpha female, do not ask me how that works. Demonstrated during the 80's or early 90's to be the result of pheromones - I saw a cite recently (probably when I did the National Institutes of Health Medline query I quoted above) but I can't remember specifics. Though it might promote monogamy and encourage all the men to go off hunting once a month. Hunting, fishing, etc., is effected by the moon... Also, in the old days, a full moon enabled a degree of nocturnal behaviour. Conceivably, all sorts of weird moon related evolutionary mechanisms might occur, it beats me. One of the more interesting (and obscure) effects is how lunar cycles affect the spawning of coral polyps - on a given reef, they all spawn at the same time in phase-lock with the moon, despite many being too deep for the moon's light to penetrate much at all, despite at least half being shaded from the moon completely, despite local cloud cover, etc. -- Herb Schaltegger, B.S., J.D. "Never underestimate the power of human stupidity." ~ Robert A. Heinlein http://www.angryherb.net |
#28
|
|||
|
|||
In article ,
"Greg D. Moore \(Strider\)" wrote: "Herb Schaltegger" wrote in message ... And it's not just menstruation. Ask anyone who works in a crisis monitoring center, an ER or a birthing center at a decent-sized hospital how the phases of the moon affect their work. And look at the second article listed there which showed zero correlation between lunar cycles and crisis call centers. And look at the many others where there is a correlation/ As for women's menstrual cycles, why only humans and not all mammals? Good question; however, many mammals don't menstruate at all; many reabsorb the endometrium rather than shed it making it difficult to measure the effects (if any). More interesting to me is that studies showing a correlation indicate about 30% of women menstruate within about +/- a day of the lunar cycle; I wonder why 30% rather than 4% (as you might expect); if 30%, why not 60% or 90%? Those are the more interesting questions. And why 28 days when millions of years ago the moon's period was different? Menstruation (absent hormonal contraceptives) is rarely 28 days; that's a mean not an absolute. Two generations-plus of women with relatively easy access to oral contraceptives have conditioned people to just accept that "a woman's cycle is 28 days." It isn't, necessarily. In fact, it's usually a little longer absent external hormonal influences to synchronize it. For a real skewer in the stats, look at women who get contraceptive injections or who have hormone-laced IUD's implanted (my wife has one of those) - after a month or so, they don't have periods at all, or if they do they're so slight as to be nearly unnoticeable. Neither is the lunar cycle exactly 28 days. The moon's orbital period is 27.3 days, yet because of the Earth's own orbit around the sun, the moon's synodic period is about 29.5 days. The phases of the moon therefore aren't 28 days either. So, a more specific answer to your exact question is: how do we know millions of years ago that women's periods weren't different? We already know they are affected by pheromones from other women in close proximity, hormones from contraceptives, stress hormones (e.g., reactions of the body from emotional and physical duress), nutrition, exercise levels (ask a 16 year old gymnast with 2% body fat and see if she's ever had a period in her life), and so forth. Why should gravitational tides be any different? -- Herb Schaltegger, B.S., J.D. "Never underestimate the power of human stupidity." ~ Robert A. Heinlein http://www.angryherb.net |
#29
|
|||
|
|||
"AA Institute" wrote in message
om... No matter what kind of orbital colony you establish, their effluence will need disposal into space and sooner or later you'll end up with a ring around the habitat scattered along its orbit around the Earth. Unless you establish the kind that breaks waste products down into their constituent elements for re-use. -- Regards, Mike Combs ---------------------------------------------------------------------- Member of the National Non-sequitur Society. We may not make much sense, but we do like pizza. |
#30
|
|||
|
|||
"Mike Combs" wrote in message ... "AA Institute" wrote in message om... No matter what kind of orbital colony you establish, their effluence will need disposal into space and sooner or later you'll end up with a ring around the habitat scattered along its orbit around the Earth. Unless you establish the kind that breaks waste products down into their constituent elements for re-use. Ahh, a MAGIC space station. |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Space Calendar - August 27, 2004 | Ron | Misc | 14 | August 30th 04 11:09 PM |
Space Calendar - November 26, 2003 | Ron Baalke | History | 2 | November 28th 03 09:21 AM |
Space Calendar - August 28, 2003 | Ron Baalke | Misc | 0 | August 28th 03 05:32 PM |
Space Calendar - July 24, 2003 | Ron Baalke | Misc | 0 | July 24th 03 11:26 PM |