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Light Polluted Skies

Light Polluted Skies

Image of the Rosette Nebula taken under heavily light polluted skies. The overall yellow hew on the image is due to various light sources in and around any urban setting, even in Flagstaff where low pressure sodium street lighting is common. Although image processing can reduce such effects, a narrow band pass filter that excludes most of the offending wavelengths, would be far more effective and produce a higher contrast and better color balanced image. Check Nebulae Gallery 4 in the Photo section of our website for an image of the Rosette taken with a similar telescope and an IDAS LPS-V4 narrow band pass filter.

Contributed by . . . Klaus Brasch

The following was retrieved from Wikipedia, the free encyclopedia, at en.wikipedia.org/wiki/Astrophotography

on February 28, 2016


"Astrophotography is a specialized type of photography for recording images of astronomical objects and large areas of the night sky. The first photograph of an astronomical object (the Moon) was taken in 1840, but it was not until the late 19th century that advances in technology allowed for detailed stellar photography. Besides being able to record the details of extended objects such as the Moon, Sun, and planets, astrophotography has the ability to image objects invisible to the human eye such as dim stars, nebulae, and galaxies. This is done by long time exposure since both film and digital cameras can accumulate and sum light photons over these long periods of time. Photography revolutionized the field of professional astronomical research, with long time exposures recording hundreds of thousands of new stars and nebulae that were invisible to the human eye, leading to specialized and ever larger optical telescopes that were essentially big cameras designed to collect light to be recorded on film. Direct astrophotography had an early role in sky surveys and star classification but over time it has given way to more sophisticated equipment and techniques designed for specific fields of scientific research, with film (and later astronomical CCD cameras) becoming just one of many forms of sensor.

Astrophotography is a large sub-discipline in amateur astronomy where it is usually used to record aesthetically pleasing images, rather than for scientific research, with a whole range of equipment and techniques dedicated to the activity."

The license terms of this written work from Wikipedia may be found at http://creativecommons.org/licenses/by-sa/3.0/

Astrophotography on the CAS Website

Astrophotography on the Web

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