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Sagittarius Treasuries (M20, M8, NGC6559, IC4685) Ha Pavel Pech
http://blog.astrofotky.cz/pavelpech
Sagittarius Treasuries (M20, M8, NGC6559, IC4685) Ha
http://www.astro.cz/galerie/d/54056-1/SagittariusTreasuries_Ha_FULL.jpg