space medium mcq

What is the approximate lifespan of a star like our Sun on the main sequence?

  1. 1 million years
  2. 10 billion years
  3. 100 billion years
  4. 1 trillion years

Answer: 10 billion years

Sun-like stars spend ~10 billion years fusing hydrogen. The Sun is currently ~4.6 billion years old, halfway through its main sequence phase.

Topic Astronomy - Stars
Exam Relevance SSC CGL, UPSC Prelims

More Space Questions