How much of its lifetime does the average star spend on the main sequence?
A)1%
B)10%
C)20%
D)90%

Question

Quizplus · Accepted Answer

The main sequence is the longest phase of a star's life cycle, during which it burns hydrogen in its core. On average, a star spends about 90% of its lifetime on the main sequence. This means that for a star like the Sun, which has a total lifetime of about 10 billion years, it will spend about 9 billion years on the main sequence.

How Much of Its Lifetime Does the Average Star Spend