Cometary Science Newsletter Issue 5 August 2015 http://www.cometarysciencenews.org/ - NASA SBAG Cometary Science Goals - Refereed Journal Papers + The Composition of Comets + Dynamic Sublimation Pressure and the Catastrophic Breakup of Comet ISON + Nucleus and Mass Loss in Active Asteroid 313P/Gibbs + Dynamics of High-Velocity Evanescent Clumps [HVECs] Emitted from Comet C/2011 L4 as Observed by STEREO + The Composition of the Protosolar Disk and the Formation Conditions for Comets + Effect of Stellar Encounters on Comet Cloud Formation + CCD Polarimetry of Distant Comets C/2010 S1 (LINEAR) and C/2010 R1 (LINEAR) at the 6-m Telescope of the SAO RAS + What Drives the Dust Activity of Comet 67P/Churyumov-Gerasimenko? -- The Cometary Science Newsletter is dedicated to sharing and furthering cometary science. CSN invites contributions from the astronomical and planetary science communities, including abstracts of papers accepted for publication in refereed journals, thesis abstracts, timely notes on particular comets, conference announcements, job announcements, or other relevant and brief scientific communications. Relevant topics include observational, theoretical, and laboratory work concerning comets, but also may include studies of associated phenomena, such as Centaurs, asteroid-comet transition objects, debris disks, and protoplanetary disks.