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What are these white dots on a lunar photo?
http://www.lpi.usra.edu/resources/lu...info.shtml?223
Click on the picture. There's a lot of white dots which are clearly some sort of noise on the film. Does anybody know why these imperfections appear? |
#2
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What are these white dots on a lunar photo?
They're finger prints on the negative.
Scott wrote in message oups.com... http://www.lpi.usra.edu/resources/lu...info.shtml?223 Click on the picture. There's a lot of white dots which are clearly some sort of noise on the film. Does anybody know why these imperfections appear? |
#3
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What are these white dots on a lunar photo?
Yep, sorry to have to agree. Great pictures but whoever handled this
material needs a head modification - like a head removal?? If you want to be kind to him/her, buy a box of linen gloves for them. Note that the skin oils of some people are able to etch most things - in some cases, even stainless steel! "reconair" wrote in message ... They're finger prints on the negative. Scott wrote in message oups.com... http://www.lpi.usra.edu/resources/lu...info.shtml?223 Click on the picture. There's a lot of white dots which are clearly some sort of noise on the film. Does anybody know why these imperfections appear? ----------------- www.Newsgroup-Binaries.com - *Completion*Retention*Speed* Access your favorite newsgroups from home or on the road ----------------- |
#4
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What are these white dots on a lunar photo?
Yup, people don't realize how dangerous human touch is to certain
materials. We're slightly acidic(?) so anything we touch is going to get a dose of etching acid, and then the disintegration sets in. So during the holidays, be careful of that handshake or your palm may melt away, or that hug lest your clothing disintegrate, or heaven forbid, kissing; God Knows what bugs are sitting there patiently on that person's lips, just waiting for the next ride to hitch on to come by. (^_^) --- Dave Pat wrote: Yep, sorry to have to agree. Great pictures but whoever handled this material needs a head modification - like a head removal?? If you want to be kind to him/her, buy a box of linen gloves for them. Note that the skin oils of some people are able to etch most things - in some cases, even stainless steel! "reconair" wrote in message ... They're finger prints on the negative. Scott wrote in message oups.com... http://www.lpi.usra.edu/resources/lu...info.shtml?223 Click on the picture. There's a lot of white dots which are clearly some sort of noise on the film. Does anybody know why these imperfections appear? ----------------- www.Newsgroup-Binaries.com - *Completion*Retention*Speed* Access your favorite newsgroups from home or on the road ----------------- |
#5
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What are these white dots on a lunar photo?
reconair wrote: They're finger prints on the negative. Scott I'm not so sure. Enlarge the image and you will see very distinct white dots. Others look like the lines left by lights on overexposed film. |
#7
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What are these white dots on a lunar photo?
On Sat, 30 Dec 2006 15:55:56 -0700, Randy Merritt
wrote: The white "lines" in several places do bear a remarkable resemblance to fingerprints. How old was the film? There are also two triangular shaped dots that could be defects on the film. A few more details on what equipment was used in making these shots might help. I've recently completed a series of test shots at half moon using a digital CCD camera and I have no spurious spots anywhere (which help eliminate internal light reflection issues). The image linked to at http://www.lpi.usra.edu/resources/lu...info.shtml?223 was created by one of the Lunar Orbiters in 1966-67. See http://nssdc.gsfc.nasa.gov/planetary.../lunarorb.html for more details on the Lunar Orbiter missions. The white spots were caused by defects in the film processing. The film was processed automatically on the spacecraft and the images transmitted to Earth, untouched by human hands. This Lunar Orbiter image is one of the great photographs of the 20th Century: http://www.donaldedavis.com/2004%20new/COPERNho.gif I remember it well. I was in college when it came out. Bud -- The night is just the shadow of the Earth. |
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