Question

1. why cant we watch a star undergo different life changes? (2pts)

Explanation:

Stars have extremely long lifespans. For example, our Sun is expected to exist for about 10 billion years. Human lifetimes are too short (usually less than 120 years) to observe a star undergoing all its life - cycle changes.

Answer:

Because stars have extremely long lifespans (often billions of years), and human lifetimes are too short (usually less than 120 years) to witness a star going through all its life - cycle changes.