Choose the best answer to each of the
Chapter , Problem 12QQ(choose chapter or problem)
Problem 12QQ
Choose the best answer to each of the following. Explain your reasoning with one or more complete sentence
When we observe a distant galaxy whose photons have traveled for 10 billion years before reaching Earth, we are seeing that galaxy as it was when the universe was about (a) 10 billion years old. (b) 7 billion years old. (c) 4 billion years old.
Unfortunately, we don't have that question answered yet. But you can get it answered in just 5 hours by Logging in or Becoming a subscriber.
Becoming a subscriber
Or look for another answer