Cometary Science Newsletter Issue 13 Apr 2016 http://www.cometarysciencenews.org/ - One Year of the Cometary Science Newsletter - Letter to the Editor + Cryovolcanoes and the Nucleus of Comet 29P/S-W1 - Conference Announcements + First Announcement: Symposium Comets 2016 - Refereed Journal Papers + Rotationally induced surface slope instabilities responsible for CO₂ activity of Comet 103P/Hartley 2, Steckloff et al. + The CO₂ Abundance in Comets C/2012 K1 (PanSTARRS), C/2012 K5 (LINEAR), and 290P/Jager as Measured with Spitzer, McKay et al. + HCN observations of comets C/2013 R1 (Lovejoy) and C/2014 Q2 (Lovejoy), Wirström et al. + Anatomy of outbursts and quiescent activity of Comet 29P/Schwassmann–Wachmann, Miles et al. + Discrete sources of cryovolcanism on the nucleus of Comet 29P/Schwassmann–Wachmann and their origin, Miles + Heat of solution: A new source of thermal energy in the subsurface of cometary nuclei and the gas-exsolution mechanism driving outbursts of Comet 29P/Schwassmann‒Wachmann and other comets, Miles -- 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.