The celestial equator divides an imagined celestial globe into two hemispheres just as Earth’s equator does, and the center of Earth’s own galaxy, the Milky Way, lies to the south of the celestial equator.
The sentence gives two information - the CE divides an imagined celestial globe into two hemispheres and
- the center of the Milky Way lies to the south of the celestial equator.
(A) the center of Earth’s own galaxy, the Milky Way, lies - meaning is distorted so Incorrect
(B) the center of the Milky Way, the galaxy where Earth is located(Noun modifier - Milky way) , lies - Correct
(C) Earth’s own galaxy, which lies at the Milky Way’s center, lies - it says Earth's galaxy lies to the south of the celestial equator rather that the Milky way's center - incorrect
(D) the Milky Way’s center of Earth’s own galaxy is located - awkward construction and distorted meaning
(E) the Milky Way, which is located at Earth’s galaxy’s center, lies - it says the Milky way is located at Earth's galaxy's (i.e., the Milky way) center - not possible - Incorrect
Answer - B