Answer: umbras

AnswerCrossword Clue
UMBRASDeepest shadows
UMBRASAstronomical shadows
UMBRASShadowy apparitions
UMBRASShadows
UMBRASEclipse shadows
UMBRASPlanetary shadows
umbrasa shaded area
umbrasshade; shadow
umbrasthe complete or perfect shadow of an opaque body, as a planet, where the direct light from the source of illumination is completely cut off
umbrasphantom; ghost; spectral image
umbrasconical shadow excluding all light from a given source
umbrasUMBRA, a dark area
umbrasthe dark central portion of a sunspot