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Post by nomuse on Jun 22, 2006 16:42:51 GMT -4
Heh. Just to clarify, by "long exposure" I meant on the order of years. No idea if hard UV degrades any of the protein bonds, but getting thoroughly desiccated isn't going to do the feather any good over the long haul.
As far as dropping the feather -- I'd be more concerned about taking it outside in a storm and dropping it in an oil slick. A few minutes on the Moon isn't going to do much of note.
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Post by HeadLikeARock (was postbaguk) on Jun 23, 2006 11:36:28 GMT -4
On the subject of the"hammer and feather" experiment, one of the HB dvd's I saw on Google (I forget which one), purported to show the same experiment performed on earth. The "technician" dropped a feather and a hammer, and both hit the ground at the same time. However, the (quite large) feather had the quill pointing vertically downwards, so the air resistance was bound to be far less than had it been held horizontally, as it was the Apollo demonstration on the surface of the moon.
Yet more evidence that these so-called Apollo debunking DVDs have no intention of finding the truth. They merely try to twist the truth to back up their own claims, with just one aim: selling more DVDs to make money.
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Post by BertL on Jun 23, 2006 11:56:24 GMT -4
That one would be the Bennett & Percy one.
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Post by HeadLikeARock (was postbaguk) on Jun 23, 2006 12:17:18 GMT -4
That one would be the Bennett & Percy one. It would indeed. I've just checked out "A funny thing happened on the way to the moon" on Google video. Don't know whether to laugh or cry. Their description of how the Apollo 11 astronauts allegedly "faked" the video footage of earth while 130,000 miles out took me about 5 minutes to completely refute, with the aid of the "Print Screen" button, MS Paint, and the rotate and zoom functions in Windows picture viewer. There is NO WAY these people have properly studied this footage and come to their ridiculous conclusions: they have concocted a story to spoon-feed the the gullible, and people who aren't prepared or equipped to do some very simple research themsleves. Using stock footage of Vietnam, nuclear explosions, the Nuremberg rallies (?) and the Kennedy assassination is just a cynical technique to emotionally manipulate its intended audience. "Investigative Journalism" of the very poorest kind. [Edited for typo]
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Post by mndwrp on Jun 23, 2006 16:20:32 GMT -4
I've just checked out "A funny thing happened on the way to the moon" on Google video.
you should also check out "Astronauts gone wild" by the same moron .. i think its also on google video. "A funny thing" was pretty stupid but "Astronauts" just makes me angry
(i know its off topic .. sorry guys !)
in a time like thins i am reminded of what a wise man once said .. that wise man being Sideshow Bob .. and i quote .. "Die Bart Die"
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Post by Count Zero on Jun 23, 2006 19:30:56 GMT -4
in a time like thins i am reminded of what a wise man once said .. that wise man being Sideshow Bob .. and i quote .. "Die Bart Die" But that's just german for "The Bart The". No one who speeks german could be evil. ;D
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Post by freon on Jun 26, 2006 12:02:02 GMT -4
Does anyone know of any records of observations of this feather during the rest of the mission as of its condition? Sure the experiment was great and that it showcased Galileo's theory. I'm more interested in the affects the environment had on the feather and the follow up on its condition. Did they do any follow up on it to observe its reaction to the surface temperature and solar radiation?
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Post by Jason Thompson on Jun 26, 2006 12:23:43 GMT -4
No. The feather was purely for the purpose of demonstrating the principle of objects falling at the same rate in a gravitational field. Fater Scott dropped it he went back to packing up the LM ready to go home again. The feather was almost certainly buried in dust within a few minutes. Anyway, what would be the purpose of studying the feather?
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Post by phunk on Jun 26, 2006 12:35:51 GMT -4
They could put a feather under UV light in a vacuum on earth, no need to go to the moon for that experiment.
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Post by PhantomWolf on Jun 26, 2006 22:00:16 GMT -4
Does anyone know of any records of observations of this feather during the rest of the mission as of its condition? Sure the experiment was great and that it showcased Galileo's theory. I'm more interested in the affects the environment had on the feather and the follow up on its condition. Did they do any follow up on it to observe its reaction to the surface temperature and solar radiation?
It was one of the last things they did before getting back onboard to head home, so there weren't any. I have a funny feeling they left two feathers behind too.
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Post by freon on Jun 27, 2006 11:50:45 GMT -4
The Apollo missions landed early in the lunar day. A lunar day is 28 earth days. So does that mean that in the morning on the moon during these missions that the sun had already been heating the moon for about 7 days? Is a lunar morning 7 to 14 days?
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Post by Jason Thompson on Jun 27, 2006 12:12:48 GMT -4
No. At the landing sites it was just past sunrise when the LM touched down. The longest missions stayed three Earth days on the surface, so by the time they left the surface at the site had been in sunlight for just slightly longer than they had been there. Since a lunar day is 28 Earth days long, that means that during one Earth day on the lunar surface the Sun moves about the same distance across the sky as it does in just over an hour on Earth. They weren't even there long enough to experience local noon.
The choise of timing was deliberate, and was related to thermal considerations (early moring being about the coolest part of the day) and lighting conditions (the low sun angle casting long shadows and emphasising surface relief for the descending astronauts to see).
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Post by freon on Jun 27, 2006 13:25:32 GMT -4
I understand the the Apollo sites are always facing us. As viewed from the Earth. So if they landed on the moon in the early moon morning than would this have been viewed as a crescent, quarter, or Gibbous phase of the moon from Earth?
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Jason
Pluto
May all your hits be crits
Posts: 5,579
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Post by Jason on Jun 27, 2006 13:28:48 GMT -4
Obviously that depends on where on the moon they were landing. If they were landing in what would appear as "the middle" of the moon as viewed from Earth then the moon would be in it's quarter phase at the time they landed.
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Bob B.
Bob the Excel Guru?
Posts: 3,072
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Post by Bob B. on Jun 27, 2006 13:57:47 GMT -4
Obviously that depends on where on the moon they were landing. If they were landing in what would appear as "the middle" of the moon as viewed from Earth then the moon would be in it's quarter phase at the time they landed. And the landings always occurred during a waxing moon, i.e. while the sunrise terminator was moving across the visible face of the Moon. Therefore, if a landed occurred during a quarter phase, it would have been first quarter rather than last quarter. Last quarter occurs during a waning moon.
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