Question

question 20 of 25
which best describes the final phase in our suns life cycle?
a. it will expand and become a red giant.
b. it will collapse and become a brown dwarf.
c. it will explode and form a black hole.
d. it will collapse and become a white dwarf.

Explanation:

The Sun is a medium - sized star. Medium - sized stars like the Sun, after exhausting their nuclear fuel, first expand into a red giant. Then, after losing their outer layers, they collapse to form a white dwarf. A brown dwarf is not the end - stage of a star like the Sun. A black hole is formed from the collapse of very massive stars (much more massive than the Sun). While the Sun will expand into a red giant at one stage, the final phase is becoming a white dwarf.

Answer:

D. It will collapse and become a white dwarf.