Location: Warrumbungle Observatory, Australia (149 11 E, 31 16 S)
Date: 2 and 5 July 2013
Camera: QHY-9 and QHY filters
Telescope: William Optics M120
Frames: Eighteen 10 minute luminance frames and fifteen 300 second exposures for each
Processing: Stacked in CCDStack, balanced, curves, highlights, sharpened and increased
colour in Photoshop SC5.
Text adapted from APOD: In the centre of the above picture are many of NGC 6520's bright blue stars. They formed
only millions of years ago - much more recently than our ancient Sun which formed billions of years ago. On
the left is a dark nebula, molecular cloud Barnard 86, from which the stars of NGC 6520 surely formed.
This nebula contains much opaque dust that blocks light from the many stars that would have been visible in the
background. Surrounding NGC 6520 is part of the tremendously dense starscape in the bulge of our Milky Way
Galaxy, the extended halo of stars that surrounds the center of our Galaxy. NGC 6520 spans about 10 light years
and lies about 5500 light years away toward the direction of Sagittarius.