On what grounds are astronomers able to say that the Sun has about 7 _ 109 years
Chapter 11, Problem 7(choose chapter or problem)
On what grounds are astronomers able to say that the Sun has about 7 _ 109 years remaining in its main-sequence stage?
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