An Unexpected Sight Close to Alnasl

An unexpected sight close to Alnasl (gamma sgr) and W sgr:
“Black lines coming out of W sgr.

Object Name: Dark lines and NGC 6528 and NGC 6522 (Globular Clusters and Barnards)
Location: Benacebada, Granada (Spain)
Date: 2010.07.10
Media: graphite pencil, white paper.

Telescope: 16″ Dob. The observing conditions: with new moon, the seeing and transparency excellent.

I hope you enjoy it!
Leonor
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