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Sharpless 82 is a small emission nebula, surrounded by a spectral blue reflection nebula. These two nebulas lie ahead a vast and variegated dark cloud of dust, shaped like a eagle wing, that absorbe the light from distant stars. The whole complex takes place in the small Sagitta constellation.
In order to produce the color image
seen here, I worked with data coming from 2
different photographic plates taken at Palomar Observatory
in 1985 and 1986. The original file is
3,630
× 4,485
pixels with a resolution of about 1 arcsec per pixel. The image show an
area of sky large
1.0°
×
1.2° (for
comparison, the full-Moon is about 0.5° in diameter). Other images of the same celestial field found online
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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