An Etymological Dictionary of Astronomy and Astrophysics
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Situated around a → nucleus, as of a → circumnuclear disk.

→ circum- + → nuclear.

A thick disk of gas and dust clouds surrounding the → Galactic Center up to about 20 → light-years. The disk is very clumpy; the → clumps have densities of several 10⁵ particles/cm³, radii of about 0.3 light-years, and gas temperatures above 100 K. The hydrogen mass of the disk is a few 10⁴ → solar masses. Such circumnuclear disks are present also in other galaxies.

→ circumnuclear; → disk.