Hi Reiner,
I had a chance to observe Abell 21 a few nights ago. Conditions were rather poor. Seeing was mediocre and transparency was low due to very high humidity and patches of fog in my...
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Hi Reiner,
I had a chance to observe Abell 21 a few nights ago. Conditions were rather poor. Seeing was mediocre and transparency was low due to very high humidity and patches of fog in my...