76 August 2014 sky & telescope
Sean Walker
Gallery
◀ PLASMA ARC
Paolo Porcellana
A broad prominence and thin spicu-
lae appear along the solar limb while
a long fi lament curves across the
solar atmosphere at right.
Details: 150-mm refractor with DayStar
Quantum 0.5-angstrom solar Hα fi lter
and Point Grey Research Chame-
leon video camera. Stack of multiple
exposures recorded on April 20th.
Both negative and positive images were
combined to produce this image.▾ (^) WHIRLPOOL FLYBY
Rolando Ligustri
Moderately bright Comet C/2012
K1 PanSTARRS is caught slipping
by M51 in Canes Venatici on the
evening of May 2nd.
Details: Takahashi FSQ-106N astro-
graph with FLI ProLine PL11002M
CCD camera. Total exposure was 21
minutes through color fi lters.
Gallery showcases the fi nest astronomical images submitted to us by our readers. Send your very best shots to
[email protected]. We pay $50 for each published photo. See SkyandTelescope.com/aboutsky/guidelines.