stunning hourglass with cosmic background, time concept

time perception time space time symbolism astronomical time flies tempus fugit time space futuristic metaphysical time-related imagery time lapse time efficiency time tracking time management tools time precious productivity urgency time running mortality existence philosophy science interstellar cosmic background timepiece antique vintage hourglass time measurement conceptual art surreal 3D rendering infinity eternity temporal time countdown nebula stars galaxy time deadline concept astronomy time passing space sand timer deadlines time management universe cosmic time concept hourglass