commettras
Commetras are a theoretical class of microscopic particles proposed to exist in the dust tails of comets. Used in speculative astronomy and fiction, commetras are imagined as compact, elongated grains that interact with sunlight in distinctive ways.
The term is a compound of “comet” and a Greek-root element meaning measure or metric, reflecting their
Typical descriptions place commetras at sizes of roughly 50–500 nanometers in length with cross-sections of 5–20
Evidence for real commetras is, at present, hypothetical. Some models suggest they could help explain unusual
In fiction and thought experiments, commetras are used to illustrate dust processing, radiative interactions in dusty