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Edgy stars

Celestial sketcher Erika Rix explains how to remove rough edges around stars — a whole field at a time.
RELATED TOPICS: ASTROSKETCHING
Erika-Rix
Regardless of the effort I put into drawing perfectly round stars, every jagged imperfection reveals itself once I scan the sketch and display it on my computer monitor. In a previous issue, I explained how to remove the rough edges around individual stars with a cloning tool found in image-processing software. Now, I’d like to share a technique that tackles the entire star field in one swoop so that you can tidy even open star clusters like NGC 1502 with ease.

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