Astronomy - June 2015

72 ASTRONOMY • JUNE 2015

1. LOOP DE LOOP
   This composite image combines 28
   exposures of Venus from November
   2013 to March 2014. Of those, the first
   16 show the planet in the evening sky
   and the last 12 catch it in the morn-
   ing sky. (Venus: Canon EOS 5D Mark
   II DSLR, 50mm f/1.8 lens set between
   f/2.8 and f/3.5, ISO 400 generally, but
   also ISO 200 and ISO 800 on occasion;
   background sky: Canon EOS 6D DSLR,
   50mm f/1.8 lens set at f/3.2, ISO 800)

• Tu nç Te ze l

2. AGE DISCRIMINATION
   Open cluster NGC 6791 in Lyra ranks
   as one of the oldest of these objects.
   Recent studies date some of its stars
   to 8 billion years old. (8-inch Explore
   Scientific PN 208/3.9 Newtonian
   Astrograph at f/4.1, Canon XSi DSLR,
   ISO 800, thirty-seven 5-minute expo-
   sures, stacked) • Chuck Kimball


3. CRUISING THE DEEP SKY
   Comet Lovejoy (C/2014 Q2) passed
   near globular cluster M79 in December.
   Look closely to see the galaxy NGC
   1886 immersed in the coma. (4-inch
   Takahashi FSQ-106ED refractor, SBIG
   STL-11000M CCD camera, LRGB image
   with exposures of 3, 1, 1, and 1 hour,
   respectively, taken December 29, 2014,
   remotely from Siding Spring, Australia)

• José J. Chambó

READER

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August 10, 2014