heiligenschein

250px|right|thumb|Heiligenschein, or hotspot, around the shadow of a hot-air balloon cast on a field of standing crops ([[Oxfordshire, England)]]

(; ) is an optical phenomenon in which a bright spot appears around the shadow of the viewer's head in the presence of dew. In photogrammetry and remote sensing, it is more commonly known as the hotspot. It is also occasionally known as '''Cellini's halo''' after the Italian artist and writer Benvenuto Cellini (15001571), who described the phenomenon in his memoirs in 1562.