Credit & Copyright: George Ritchey, Yerkes Observatory -
Digitization Project:
W. Cerny,
R. Kron, Y. Liang, J. Lin, M. Martinez, E. Medina, B. Moss, B. Ogonor, M. Ransom, J. Sanchez (Univ. of Chicago)
Explanation:
By the turn of the 20th century advances in photography
contributed an important
tool for astronomers.
Improving photographic materials,
long exposures, and new telescope designs produced astronomical
images with details not visible at
the
telescopic eyepiece alone.
Remarkably
recognizable to astrophotographers today,
this stunning image of the star forming Orion Nebula was captured in
1901 by American astronomer and telescope designer
George Ritchey.
The original glass photographic plate, sensitive to green and blue
wavelengths, has been digitized and light-to-dark inverted
to produce a positive image.
His hand written notes indicate a 50 minute long exposure that ended at
dawn and a reflecting telescope
aperture of 24 inches
masked to 18 inches to improve the sharpness of the recorded image.
Ritchey's plates from over a
hundred years ago preserve astronomical data and can still be used for
exploring astrophysical processes.
R. Kron, Y. Liang, J. Lin, M. Martinez, E. Medina, B. Moss, B. Ogonor, M. Ransom, J. Sanchez (Univ. of Chicago)
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Publikacii s klyuchevymi slovami:
astrofotografiya - Tumannost' Oriona
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