Welcome to the umbral gyre

umbra

noun, plural um·bras or um·brae (-brē), adjective um·bral

1. shade; shadow.
2. the invariable or characteristic accompaniment or companion of a person or thing.
3. Astronomy.
   1. the complete or perfect shadow of an opaque body, as a planet, where the direct light from the source of illumination is completely cut off.
   2. the dark central portion of a sunspot.
4. a phantom or shadowy apparition, as of someone or something not physically present; ghost; spectral image.

gyre

noun

1. a ring or circle.
2. a circular course or motion.
3. Oceanography. a ringlike system of ocean currents rotating clockwise in the Northern Hemisphere and counterclockwise in the Southern Hemisphere.