Answer: Option (D) is the correct answer.
Step-by-step explanation:
Astronomers take photographs in the space so that they can get to know the previous and present position of celestial objects, astronomical objects etc.
This will also help them to know changes occurring in the space and if something unusual seems then they can research on it in order to know what exactly it is.
Therefore, we can conclude that space photography help astronomers as it helped reveal changes in the position and appearance of celestial objects.