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In order to produce the color image
seen here, I worked with data coming from 2 different plates taken
at Palomar Observatory
between 1989 and 1992.
The original file is 5,828x6,018 pixels with a resolution of about 1 arcsec per pixel. The image show an area of sky large
1.6° x 1.7° (for
comparison, the full-Moon is about 0.5° in diameter). This image is a composite from black and white images taken with the Palomar Observatory's 48-inch (1.2-meter) Samuel Oschin Telescope as a part of the second National Geographic Palomar Observatory Sky Survey (POSS II). The images were recorded on two type of glass photographic plates - one sensitive to red light and the other to blue light and later they were digitized. Credit: Caltech, Palomar Observatory, Digitized Sky Survey. |
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