When we look at an object that is 1,000 light-years away we see it
A)as it was 1,000 years ago.
B)as it was 1,000 light-years ago.
C)as it is right now,but it appears 1,000 times dimmer.
D)looking just the same as our ancestors would have seen it 1,000 years ago.

Question

Quizplus · Accepted Answer

When we look at an object that is 1,000 light-years away, we are essentially seeing it as it was 1,000 years ago. This is because the light from the object takes 1,000 years to reach us, so we are seeing what it looked like 1,000 years ago.

When We Look at an Object That Is 1,000 Light-Years