Explain why elements heavier than iron are not found in stars. Why isn’t it possible to know what is happening to our nearest neighbor stars today (in the next 24 hours)? During which stage of the...

Explain why elements heavier than iron are not found in stars.

Why isn’t it possible to know what is happening to our nearest neighbor stars today (in the next 24 hours)?

During which stage of the beginning of the universe would you expect deuterons to be formed? Explain.

What happened to the neutrons produced in the early stages of the universe that were not synthesized to deuterons or 4He nuclei?

During what time period do free neutrons disappear? Explain.

Explain how it might be possible to confuse the redshifts from recession velocities with the gravitational redshifts. How can we distinguish the two?