Question

Which of the following is true? A) It takes light about 100,000 years to cross our galaxy.

B) If you could see the most distant parts of our universe, you would be looking at least ten billion years back in time.
C) Because of the distances to the stars, it is impossible to see stars "in the present." Each is seen at a different point in time in the past.
D) All of the above are true.
E) None of the above are true.

Answer 1

If you could see the most distant parts of our universe, you would be looking at least ten billion years back in time because light takes time to travel. Option B is correct.

Step-by-step explanation:

The correct answer is B) If you could see the most distant parts of our universe, you would be looking at least ten billion years back in time. This is because light takes time to travel from distant objects to our eyes. The farther we look into space, the longer it takes for the light to reach us. Therefore, when we observe very distant parts of the universe, we are actually seeing them as they were billions of years ago.

For example, the light from the most distant galaxy we observed today left it approximately 14 billion years ago. This gives us a unique opportunity to study the past and understand how the universe has evolved over time.