Sky and Telescope - June 2018 - 75
t WHIRLPOOL OF STARS
Lloyd L. Smith
Messier 51 in Canes Venatici is an interacting pair
of galaxies, with NGC 5195 (top) having recently
passed near the large spiral NGC 5194. This interaction has produced the ghostly faint halo of stars
extending well beyond the bluish spiral arms seen
at left and upper right.
DETAILS: RCOS 14½-inch Ritchey-Chrétien telescope
with an SBIG STX-16803 CCD camera. Total exposure: 18 hours through LRGB ﬁlters.
q WINTER HUNT
The winter constellations Canis Major and Orion
(center) appear to chase Taurus (upper right) above
Cathedral Rock near the dark-sky community of
DETAILS: Nikon D750 DSLR camera with Tamron
15-to-30 mm zoom lens at 15 mm, and f2.8. Total
exposure: 15-seconds at ISO 3200.
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