In order to learn how to use these databases, I first test with Messier objects. I think most people with astronomy interest know about Messier, if not you can get more information from the link below.
Below you will see which objects I have selected first, the idea is that you can compare these photos from different observatories with your own:
Hercules Globular Cluster
|Images from POSS-I plates, credits STScI
Image processing by Lars Karlsson
Observatory list and data bases:
The idea is that you shall find above objects at each observatory/database I list below:
More will come later, I must practice first so I now how to handle the data.
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