#23. astrodeep200407aec.png : 無料・フリー素材/写真
#23. astrodeep200407aec.png / rmforall@gmail.com
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
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| 説明 | #23. Part of bottom half of Hubble Ultra Deep Field, 7.65 X 7.65 arc-sec, 255 X 255 pixels in the original HUDF, [ cropped from its original 823 X 823 p when saved on MGI PhotoSuite 4.0 as tif 112.618 MB ] becomes 1911 X 1912 pixels in this expanded view, tif 14.3 MB, uploaded as this png 9.83 MB, just below the 10 MB Flickr limit. Click on All Sizes to select Large and Original for much higher resolution. RTM-1 is a tiny bright blue galaxy pair just above the large magenta color galaxy by the lower left edge -- closeup view in #21, is very like CSL-1, only blue and more separated, but with the similar equality of size and color. It turns out that there are so many easily found pairs of all sizes, down to single pixel bright spots separated by a pixel space, that statistical studies are appropriate. Views # 20 to 29 will explore the HUDF, and provide many helpful links.The HUDF is described as 10,500 X 10,500 pixels, at 0.03 arc-seconds/pixel, giving a width of 315 arc-seconds = 5.25 arc-minutes, oriented North at top and East to the left, with the center at Right Ascension 03 hours 32 minutes 39.0 secondsDeclination -27 degrees 47 minutes 29.1 secondsThe previous photos #1-17 give the CSL-1 lens and its subtle background in the Capodimonte Deep Field.This field is 0.310 X 0.310 of the HUDF, 0.096 of its area, the largest I could upload into Flickr. 97.65 X 97.65" = 1.63 X 1.63'I used an excellent low cost image processing program, MGI PhotoSuite 4.0, to adjust the colors to bring out the subtle background details:Touchup feature: Soften: reduced from 3 to 0, as I wanted to maximize the raw detail.Color Adjustment: Cyan-Red +100 Magenta-Green +25 Yellow-Blue +50,as empirically this created a pleasing, easy to view image with maximum detail.Brightness: increased from 0 to 50, to increase the dark background details.Gamma: reduced from 1.00 to 0.80, to increase the dark background details. Fix Colors: Hue: shifted 0 to -60, to accentuate the background of myriad minutebright blue sources without losing information from the red end of the spectrum.If you inspect this carefully, especially holding a 4 inch reading glass close to both of your eyes, focussing on the tiny bright blue sources, you will easily discern many suggestive pairs, right down to the limit of two single pixel spots separated by a pixel, or even the many double pixel spots.The two sides of the convex reading glass function as opposed prisms, separating the reds and blues in such a way as to make the reds appear about a centimeter closer, creating a lovely, revealing 3D image, while moving the glass back and forth can flexibly adjust the smoothness and the sharpness of the image.I found that using a 6"X5" concave glass, which in effect has prisms opposed in the opposite direction of a convex lens, makes a smaller overall image in which the blues appear closer than the reds, which I surmise is the actual reality for these images for the tiny, subtle background features, the myriad minute bright blue sources on the apparently more distant, dark magenta mesh.The 1-2 mm red and blue sources are much closer galaxies, with their apparent colors determined by their actual temperature and the amount of redshifting, which grows linearly with distance. Much nearer to us, of course are the three 1-5 cm galaxies, while the lower left red star is very much closer, in our own galaxy. |
| 撮影日 | 2005-06-13 03:52:04 |
| 撮影者 | rmforall@gmail.com , Santa Fe, New Mexico 87505, USA |
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