A major step in this direction is to determine the cosmic stratigraphy—which objects are in front and which are more distant—among the thousands of galaxies in a typical deep-field image.
A major step in this direction is to determine the cosmic stratigraphy—which objects are in front and which are more distant—among the thousands of galaxies in a typical deep-field image.
在此方向上的一个主要步骤，是在一张深视野影像里的上千个星系之间，决定宇宙的层次：哪个物体在前方、哪个物体较为遥远。