the.com/penumbra
the fuzzy gray maybe where shadow can't decide if it's committed.
means The partial, fuzzy outer region of a shadow, where the light source is only partly blocked rather than fully obscured.
from From Latin paene 'almost' (also lurking in 'peninsula,' an almost-island) joined to umbra 'shadow' — literally an 'almost-shadow.' The astronomer Johannes Kepler is credited with coining it in the early 17th century to describe the gentler gray fringe around the dark heart of an eclipse's shadow.
- latin roots
- From paene umbra, meaning almost shadow.
- eclipse zone
- Where partial eclipse dwellers see a bite-marked sun.
- legal cameo
- Cited by Supreme Court to find unwritten rights.
- sunspot edge
- Sun's penumbrae swirl with filaments around dark cores.
for instance
lunar penumbra — the outer shadow during partial lunar eclipses, where the moon partially blocks sunlight from reaching earth
penumbra solar eclipse — the partial shadow zone during solar eclipses where observers see a partial eclipse, not totality