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This is a colourful image of Alnitak
area, in the Orion's Belt. Alnitak, also known as Zeta Orionis (Zeta Ori)
is a supergiant star with a brightness 35,000 times greater than the Sun.
Its mass is 20 times the solar mass.
In order to produce the color image
seen here, I worked with data coming from 2 different
photographic plates taken
at Palomar Observatory
between 1987 and 1990.
The original file is 3,793
×
3,291 pixels with a resolution of about 1 arcsec per pixel. The image shows an area of sky large
1.0°
×
0.8° (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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