Starship Asterisk*

Spellchecker wrote:There are a couple issues with the supporting text:

The Great Nebula in Orion is aN intriguing place. Visible to the unaided eye, it appears as a small fuzzy patch in the constellation of Orion. But this image, an illusory-color composite of four colors of infrared light taken with the Earth orbiting WISE observatory, shows the Orion Nebula to be a bustling neighborhood For recently formed stars, hot gas, and dark dust. The power behind much of the Orion Nebula (M42) is the stars of the Trapezium star cluster, seen near the center of the above wide field image. The eerie green glow surrounding the bright stars pictured here is their own starlight reflected by intricate dust filaments that cover much of the region. The current Orion Nebula cloud complex, which includes the Horsehead Nebula, will slowly disperse over the next 100,000 years.

ta152h0 wrote:I like that ... pass me an ice cold one, please

geckzilla wrote:
I suggest you find another word to use. Technique, perhaps?

Chris Peterson wrote:

ta152h0 wrote:Can you take an image of comet Lemon using the same trickery ?

Click to view full size image

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.

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.

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.

ta152h0 wrote:Can you take an image of comet Lemon using the same trickery ?

ta152h0 wrote:Can you take an image of comet Lemon using the same trickery ?

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.

ta152h0 wrote:same green that makes comet Lemon green ? or is this filter trickery ?

ta152h0 wrote:same green that makes comet Lemon green ? or is this filter trickery ?

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.


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