Users can select objects according to apparent magnitude and download their images from the Digitized Sky Survey
The stellar stream in NGC 4449 was first detected by another group of astronomers as a mysterious, faint smudge in digitized photographic plates from the Digitized Sky Survey
project, and it is also visible in archival images from the Sloan Digital Sky Survey.
The ones in this article were generated by combining the red and blue POSS-II plates from the Digitized Sky Survey
(DSS); similar results can be obtained from WikiSky or the Aladin Sky Atlas.
An essential resource for really-deep-sky observers is the Digitized Sky Survey
(DSS), based on the Palomar Observatory Sky Surveys.
The third tab is Footprints, which brings up an interactive display of the various fields of each instrument data set overlaid on a Digitized Sky Survey
(DSS) color composite of the imaged area.
The Plus version of the program ups this to about 2 1/2 million stars to 12th magnitude, 30,000 deep-sky objects (including the entire NGC and IC catalogs), about 300 images from the Digitized Sky Survey
, and roughly 1,000 object descriptions.
The pages offer too many photos of archaeological artifacts and sections from the Digitized Sky Survey
Possibly the best resource available to amateurs who want to search their own photos is the Digitized Sky Survey