Even while the Sun is still on the main sequence, it may eventually threaten life on Earth due to its
A) increasing size.
B) increasing luminosity.
C) decreasing luminosity.
D) more energetic solar flares.
E) decreasing size.

Question

Quizplus · Accepted Answer

As the Sun ages on the main sequence, its luminosity gradually increases, which can lead to higher temperatures on Earth, potentially threatening life by disrupting the climate and making the planet less habitable.

Even While the Sun Is Still on the Main Sequence