Where are we?
A) Near the edge of an expanding universe,as shown by the Great Wall of Galaxies
B) Somewhere in an expanding universe,but not in any special part of it
C) At the exact center of an expanding universe,as shown by the universal expansion away from us in all directions
D) Off-center in an expanding universe,as shown by the fact that the microwave background radiation is at a different temperature in one direction than in the opposite direction

Question

Quizplus · Accepted Answer

The universe is believed to be expanding uniformly in every direction, meaning that there is no central point or special location. Therefore, we are somewhere in an expanding universe, but not in any special part of it. Option A is incorrect because the Great Wall of Galaxies is just one of many structures observed in the universe, and it does not necessarily indicate the edge of the universe. Option C is incorrect because there is no evidence to suggest that we are at the exact center of the universe. Option D is incorrect because the temperature fluctuations in the cosmic microwave background radiation are believed to be due to other factors such as the motion of our Galaxy through the universe.

Where Are We