— x-ray astronomer .
the branch of astronomy that studies celestial objects by means of the x-rays emitted by them. Cf. x-ray (def. 1b).
[ 1960-65 ]
— x-ray astronomer .
the branch of astronomy that studies celestial objects by means of the x-rays emitted by them. Cf. x-ray (def. 1b).
[ 1960-65 ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012