Zero shadow day
The sun is directly overhead or at the zenith (the highest point in the sky)...
Astronomy & Falak Syarie in Brunei Darussalam
The sun is directly overhead or at the zenith (the highest point in the sky)...
Emersion of Kaus Borealis, Lam Sgr, SAO 186841 (Double star, separation >10"), 2.8mag, Position Angle=339.0ยฐ,...