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Here you go, PT,
http://www.astro.caltech.edu/~george/ay1...A45p77.pdf
Here is your opportunity to tell everyone how dimensionless pixels are used and how they could possibly be manufactured in the first place. In particular, how are signal wires connected to columns or rows of dimensionless pixels?
Table 1 may also be of interest to you.
Dimensionless, my arse.
PS. Your "malihini meltdown" argument becomes sillier the more you use it, especially against those that aren't newcomers. I suggest you choose another Hawaiian phrase. I'm sure the language can support whatever you use to insult everyone next time.
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Latest images from New Horizons are here - the video is quite spectacular:
http://pluto.jhuapl.edu/
The BBC have some pictures as well:
http://www.bbc.com/news/science-environment-35013190
The video reminded me of flying over Greenland apart from the impact craters. The bit where it switches from mountains to the plateau is bizarre. Quite what those plate-like structures are is going to create some debate. They're mostly frozen nitrogen but clearly formed recently given the lack of craters.
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Didn't even notice the dumbness was still going on. The word "pixel" is a contraction of the term PIC-ture ELement. The practice of taking the word "pictures" and turning it into "pix" is lost in time but was around in the 1800's. The adoption of the word pixel for computer use started in the 60's.
A pixel by itself has no dimension. It is a point. What you people are confusing is the size of the dot. You can take a magnifying glass and hold it up to your monitor, then you will see a dot size. That doesn't mean that defines the size of the pixel. Astronomy sloppily interchanges the word pixel to mean "sensor size". Yes, the sensor has dimensions and it will be comprised of an array of transistors. This is a 4K CCD.
http://www.lpl.arizona.edu/css/images/DSCN1239.JPG
Good grief. This is the same junk that was going on when HD was first being introduced. No wonder the Japanese were first. The use of the word "pixel" is like use of the term "K". K is sloppily used as 1000 when it is 1024. Computer geeks know this and just adjust mentally to its use in context. The question was mangled, like when a child asks "How many stars are there in the sky?". The question is malformed, not the subject. BTW, the example pix of what a pixel looks like is obsolete. Ask someone in Japan why.
"Aloha also means goodbye. Aloha!"
*Japanese tourist on bus through Pahoa, "Is this still America?*
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Ask someone in Japan why.
I would, but then you'd probably claim I should never have asked using the word naze, but rather nande. So how could I possibly expect to get a proper response? And I'd be out a plane ticket, a $12 cup of coffee, and be none the wiser.
Instead of wasting all that time, I'll just put on side one of Cheap Trick! Live at Budokan! The Puna version of a trip to Japan.
"I'm at that stage in life where I stay out of discussions. Even if you say 1+1=5, you're right - have fun." - Keanu Reeves
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Incredible video, Tom! Thanks for sharing.
I can't imagine how that sort of surface variety will ever be explained...
Cheers,
Kirt
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Just curious, PT, but when was the last time you worked on astronomical detectors?
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quote:
Originally posted by TomK
Latest images from New Horizons are here - the video is quite spectacular:
http://pluto.jhuapl.edu/
The BBC have some pictures as well:
http://www.bbc.com/news/science-environment-35013190
The video reminded me of flying over Greenland apart from the impact craters. The bit where it switches from mountains to the plateau is bizarre. Quite what those plate-like structures are is going to create some debate. They're mostly frozen nitrogen but clearly formed recently given the lack of craters.
Thanks for sharing,amazing video !
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"I can't imagine how that sort of surface variety will ever be explained..."
I'm sure it will be explained, Kirt, but there's still an awful lot of data to be downloaded. My guess, and it is a guess, is that the plateau may have been formed by an impact. The impact energy might have melted nitrogen-rich ices which then refroze into a much more featureless plain.
I'll keep a look-out in the literature to see if there are any feasible explanations.
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PS.
"Yes, the sensor has dimensions and it will be comprised of an array of transistors."
"BTW, the example pix of what a pixel looks like is obsolete."
So obsolete it doesn't show a transistor? For your info, PT, modern astronomical detectors do not consist of an array of transistors. These days, semiconductors are all the rage. Next thing you'll be telling us is the vacuum tubes we use for imaging are out-of-date.
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A pixel by itself has no dimension. It is a point. What you people are confusing is the size of the dot.
Pixels are ephemeral until manifest on a physical device, at which point a compound unit of measurement is necessary to express the result, eg "dots per inch".
Example: How large is a 200x300 pixel GIF image? Depends on the resolution of the output device...
