— optical astronomer .
the branch of observational astronomy using telescopes to observe or photograph celestial objects in visible light.
[ 1965-70 ]
— optical astronomer .
the branch of observational astronomy using telescopes to observe or photograph celestial objects in visible light.
[ 1965-70 ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012