Know the quiet place within your heart and touch the rainbow of possibility; be
alive to the gentle breeze of communication, and please stop being such a jerk. — Garrison Keillor
The way the different shades of colors are iterated, reminds me of a Mandelbrot set. Each iteration was a different level, like the contours of a lake. This is a fascinating image. Would have been great for Halloween.
Boomer12k wrote:The way the different shades of colors are iterated, reminds me of a Mandelbrot set. Each iteration was a different level, like the contours of a lake. This is a fascinating image. Would have been great for Halloween.
:---[===] *
Could you unpack that for me, Boomer?
This helped a bit
Click to play embedded YouTube video.
Margarita
Last edited by MargaritaMc on Wed Feb 13, 2013 1:04 pm, edited 1 time in total.
"In those rare moments of total quiet with a dark sky, I again feel the awe that struck me as a child. The feeling is utterly overwhelming as my mind races out across the stars. I feel peaceful and serene."
ta152h0 wrote:same green that makes comet Lemon green ? or is this filter trickery ?
There's no trickery involved. Neither is there any green. This is an infrared image, with the shortest captured wavelength being 3.4 μm (green light being around 0.5 μm). Indeed, most of the green in this image appears to represent 12 μm emissions.
Naturally, there would be no point in representing the color channels in their original wavelengths, unless your monitor could produce them and your eyes detect them!
Chris
*****************************************
Chris L Peterson
Cloudbait Observatory http://www.cloudbait.com
ta152h0 wrote:same green that makes comet Lemon green ? or is this filter trickery ?
[b]WISE: The Cosmic Hearth[/b] wrote:
Color in this image represents specific infrared wavelengths. Blue represents light emitted at 3.4-micron wavelengths and cyan (blue-green) represents 4.6 microns, both of which come mainly from hot stars. Relatively cooler objects, such as the dust of the nebulae, appear green and red. Green represents 12-micron light and red represents 22-micron light.
Know the quiet place within your heart and touch the rainbow of possibility; be
alive to the gentle breeze of communication, and please stop being such a jerk. — Garrison Keillor
You could certainly image a comet in the IR band from 3-22 μm, but you'd need to use WISE or some other infrared camera that was above the atmosphere, since about half that range doesn't make to to the ground.
This is a WISE image of Comet 65/P Gunn, made a few years ago. It used the same IR channels as today's APOD, but mapped to different colors.
Chris
*****************************************
Chris L Peterson
Cloudbait Observatory http://www.cloudbait.com
Two housekeeping comments:
1. The link at the top that should take us to the APOD just keeps us here.
2. A day or two ago I posted the APOD permalink to Facebook because I liked it especially and there the preview had a small version of the picture. I did it today and only got the URL. It would be nice to get a thumbnail for FB consistently.
Okay, now the link at the top does as it should. ?? Way too soon for someone to have seen that and fixed it.
nstahl wrote:A day or two ago I posted the APOD permalink to Facebook because I liked it especially and there the preview had a small version of the picture. I did it today and only got the URL. It would be nice to get a thumbnail for FB consistently.
APOD has a facebook page. You can share the image from there (even if it's a video).
Know the quiet place within your heart and touch the rainbow of possibility; be
alive to the gentle breeze of communication, and please stop being such a jerk. — Garrison Keillor
You could certainly image a comet in the IR band from 3-22 μm, but you'd need to use WISE or some other infrared camera that was above the atmosphere, since about half that range doesn't make to to the ground.
This is a WISE image of Comet 65/P Gunn, made a few years ago. It used the same IR channels as today's APOD, but mapped to different colors.
Thanks Chris. I couldn't figure out why there would be warm stuff in front of the comet's nucleus, so I followed the link you provided:
NASA wrote:Just ahead of the comet is an interesting fuzzy red feature that makes it look something like a swordfish, or narwhal. This "sword," or dust trail, is made of dust particles that have previously been shed by 65/P Gunn as it orbits the sun. The dust is warmed by sunlight and glows in infrared light. Trails appear both ahead and behind the comet's nucleus and have a narrow, contrail-like appearance. They represent the first stages in the evolution of meteoroid streams. Over time, the material in the debris trail can drift away from the comet's orbit and become clouds of debris that will be seen as meteor showers if Earth passes through them.
And yes, it's all trickery as far as I'm concerned.
Infrared Orion from WISE
my desktop image is rotated 90* from the APOD. Same when you click on it.
