Cometary Science Newsletter Issue 33 December 2017 http://www.cometarysciencenews.org/ - Refereed Journal Papers + Measuring molecular abundances in comet C/2014 Q2 (Lovejoy) using the APEX telescope, de Val-Borro et al. + Prediscovery Observations and Orbit of Comet C/2017 K2 (PANSTARRS), Hui et al. -- 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.