Optik / Mount: 180 Epsilon f2.8 Alt-5 TeenAstroCamera / Filter: ZWO ASI 6200 MM Pro Mono, Astrodon Ha,OIII ,SII ca. 10 hours (sub 600/300sec)Date 8. August 2020 The Cygnus Loop is a large supernova remnant (SNR) in the constellation Cygnus, an emission nebula measuring nearly 3° across.The visual portion of […]