A main-sequence star like our sun is expected to be stable for approximately ________.
A)100 billion years
B)10 billion years
C)1 billion years
D)100 million years
E)10 million years

Question

Quizplus · Accepted Answer

A main-sequence star like our sun is expected to be stable for approximately 10 billion years. This is known as the main-sequence lifetime of a star, during which it fuses hydrogen in its core to produce helium and releases energy in the form of light and heat. Our sun is currently about 4.6 billion years old and is expected to remain stable for another 5 billion years before it begins to run out of fuel and evolves into a red giant.

A Main-Sequence Star Like Our Sun Is Expected to Be