J. Kelly Beatty Gallery ▶ ENSHROUDED DIAMONDS Jeffrey O. Johnson NGC 6820 is a diff use nebula in Vulpecula that glows brightly thanks to the energizing radiation from the cluster of young stars (NGC 6823) near its center. Details: Takahashi FS-60C apochromatic refractor and QSI 540wsg CCD camera used with Astrodon Hα and Gen2 RGB filters. Total exposure: 3¾ hours. ▾ MERCURY'S DAY IN THE SUN Dan Dill Mercury's tiny black silhouette (lower left of center) slides across the Sun's face on May 9, 2016. Patchy clouds and a sizable sunspot group add to the event's drama. Details: Canon EOS 5D Mark III CCD camera with 400mm lens and 1.4 × extender. Exposure: ⅙0 second. SkyandTelescope.com September 2016 73http://www.SkyandTelescope.com