tag:blogger.com,1999:blog-4912713243046142041.post3069591881875125500..comments2024-03-28T23:22:41.774-05:00Comments on TYWKIWDBI ("Tai-Wiki-Widbee"): "Music" heard on the back side of the moonMinnesotastanhttp://www.blogger.com/profile/01382888179579245181noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-4912713243046142041.post-90970768175167947322014-10-05T10:04:29.784-05:002014-10-05T10:04:29.784-05:00"wind whipping in the trees" looks simil..."wind whipping in the trees" looks similar to some static white noise.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4912713243046142041.post-45835282362407708542014-08-26T12:29:42.727-05:002014-08-26T12:29:42.727-05:00And as a follow up -- NASA never did an "offi...And as a follow up -- NASA never did an "official" response to this, since they never thought people would fixate on this. However, a pretty official response is from one of the astronauts who encountered this. <br /><br />From Chapter 13 of Carrying The Fire by Michael Collins: "There is a strange noise in my headset now, an eerie woo-woo sound. Had I not been warned about it, it would have scared the hell out of me. Stafford's Apollo 10 crew had first heard it, during their practice rendezvous around the Moon. Alone on the back side, they were more than a little surprised to hear a noise that John Young in the Command Module and Stafford in the LM each denied making. They gingerly mentioned it in their debriefing sessions, but fortunately the radio technicians (rather than the UFO fans) had a ready explanation for it: it was interference between the LM's and Command Module's VHF radios. We heard it yesterday when we turned our VHF radios on after separating the two vehicles, and Neil said that it 'sounds like wind whipping around the trees.' It stopped as soon as the LM got on the ground, and started up again just a short time ago. A strange noise in a strange place." <br /><br />Note that other crews described it as "wind whipping in the trees", and "woo-woo" sounds, not "music"<br />Wales Larrisonhttps://www.blogger.com/profile/06349823446678287114noreply@blogger.comtag:blogger.com,1999:blog-4912713243046142041.post-13206314357114819962014-08-25T17:16:36.837-05:002014-08-25T17:16:36.837-05:00Nice detailed analysis. Thanks, Wales.Nice detailed analysis. Thanks, Wales.Minnesotastanhttps://www.blogger.com/profile/01382888179579245181noreply@blogger.comtag:blogger.com,1999:blog-4912713243046142041.post-28951814939713339322014-08-25T13:22:29.105-05:002014-08-25T13:22:29.105-05:00Follow up comment.. I ran a quick calc on the nu...Follow up comment.. I ran a quick calc on the numbers for a lunar gravitational lens effect. To see the lens effect you need to be 3,985,252,616 diameters of the moon away. The Apollo missions orbited in about 200 km orbits above the lunar surface. Since the moon is about 1738 km in radius, that's not any where near the lensing pointWales Larrisonhttps://www.blogger.com/profile/06349823446678287114noreply@blogger.comtag:blogger.com,1999:blog-4912713243046142041.post-60555519602798222352014-08-25T12:48:28.803-05:002014-08-25T12:48:28.803-05:00>[ ,,, ] it could be suggested that the Moon...>[ ,,, ] it could be suggested that the Moon's gravity was <br />>gravitationally focusing the Sun's wind (a mix of high energy charged <br />>particles) onto the capsule<br /><br />That's highly unlikely, as a little math and thought will show. <br /><br />a) Gravitational focusing produces a very small lens effect -- the focal point is many many diameters away from the moon. The Apollo capsules orbited much lower. So its highly unlikely that this could produce an effect. <br /><br />b) Such effects should have been also seen on other, unmanned lunar orbiters which recorded their observations and transmitted it back to Earth. None were seen. <br /><br />c) What possibly could have caused the effect? Passing through the solar wind is a lot less of an effect than passing through the Earth's magnetosphere (the Earth's magnetic field) and radiation belts. SO you would expect the effect to be much more pronounced at other times in the mission. None were encountered. <br /><br />Moreover, to produce a sound in space you need to have something vibrating or reacting inside the spacecraft. In a vacuum like space, there is no sound. THe shell of the Apoll was a good Faraday cage, with very limited penetrations for antennas and the like. So what's vibrating? A little math will show the amount of magnetic enerty needed to make the whole spacecraft vibrate is just tremendous -- to the point that you'd be seeing huge magnetic disturbances on the Earth. <br /><br />d) So.. most likely you were hearing overtones and interference from the existing Apollo radios. Remember this was 1969, using hardware that had been designed in the mid 1960's. This was state of the art in 1969 - http://www.radiomuseum.org/r/blaupunkt_marimba_7659500_7659500.html<br /><br />Radio interference easily produces tones and whistles and sounds. You can get "chords" fairly easily by harmonics caused by interference. We sort of forget today with modern digital and FM systems how much interference and staticy old VHF radios had. The Apollo went for the simplest systems they could do, because they wanted the highest reliability for something to operate at the Moon. On board the Apollo were multiple fans, sensors, a very simple computer (I've seen hand held calculators today with more power), radars, radios and etc. <br /><br />The most likely cause was when the Apollo went behind the moon, the radio and other systems went into "high gain" searching for a signal from the ground. Think of it as turning up the volume on your old car radio -- you hear a lot of static and interference. And since our brains are wired to interpret random data and try to find patterns in them, we hear "tones" and "whistle" and the like. But its really just interference and static. A fan kicks on, and you hear a "thrummmm" or tone from the rotating electic motor. A valve kicks open/shut and you hear thumps or whistles. A circuit is energized and you hear the tone from the line being energized, and then a chord as the return signal is echoed from the termination side. <br /><br />As a side note, this is what Voyager spacecraft heard around Jupiter, as it listend to the interference and interactions of the solar wind and planetary magnetosphere, https://www.youtube.com/watch?v=e3fqE01YYWs Kinda cool in my opinion <br /><br />Wales Larrisonhttps://www.blogger.com/profile/06349823446678287114noreply@blogger.com