Which of the following lists objects in order of increasing look-back time as observed from Earth?

Question

Quizplus · Accepted Answer

Look-back time increases with distance from the observer. The Moon is closest to Earth, followed by the Sun. Sagittarius A* (SagA*), the supermassive black hole at the center of the Milky Way, is farther than the Sun. The Andromeda Galaxy is the farthest among the listed objects, making option C correct.

Which of the Following Lists Objects in Order of Increasing