An Etymological Dictionary of Astronomy and Astrophysics
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A problem raised in the past by observations suggesting that the amount of carbon necessary for standard → dust models was larger than what actually observed for the → interstellar medium (ISM) (Snow & Witt 1995). The problem was especially acute for the → 2175 A bump in the ultraviolet part of the → extinction curve. The so-called "crisis" was finally solved by, on the one hand, revising downward the → solar abundances, thought to represent the ISM abundances (Asplund et al. 2009, arXiv:0909.0948, and references therein), and, on the other hand, revising upward the ISM carbon abundances (Sofia et al., 2011, AJ 141, 22S).

→ carbon; → crisis.

A decisive stage or turning point in the course of something, especially in a sequence of events or an acute disease.

M.E., from Latinized from of Gk. krisis "turning point in a disease," literally "judgment, selection," from krinein "to separate, decide, judge;cf. " L. cribrum "sieve," crimen "judgment, crime;" → critique.

Paržané, from paržan, present stem of paržanidan "to separate, sift, → critique," + -é a suffix of relation.