Which category describes red, yellow, and blue stars with different lifespans?

Which category describes red, yellow, and blue stars with different lifespans?

• A. Main Sequence
• B. Main Sequence (types)
• C. Death of a star
• D. Nebula

Answer: (B)

Stars on the main sequence span a range of colors and temperatures that correspond to different masses. Blue stars are hot and massive, yellow stars like the Sun are intermediate, and red stars are cooler and less massive. Because a star’s mass largely sets how fast it fuses hydrogen, more massive blue stars burn through their fuel quickly and have short lifespans, while lower-mass red stars burn slowly and can last much longer. Describing red, yellow, and blue stars as different types within the main sequence captures both their color/mass differences and the variation in lifespans during this hydrogen-fusing phase. The other options point to later evolutionary stages or star-forming regions, which don’t describe the variety of stars within the main sequence.

Stars on the main sequence span a range of colors and temperatures that correspond to different masses. Blue stars are hot and massive, yellow stars like the Sun are intermediate, and red stars are cooler and less massive. Because a star’s mass largely sets how fast it fuses hydrogen, more massive blue stars burn through their fuel quickly and have short lifespans, while lower-mass red stars burn slowly and can last much longer. Describing red, yellow, and blue stars as different types within the main sequence captures both their color/mass differences and the variation in lifespans during this hydrogen-fusing phase. The other options point to later evolutionary stages or star-forming regions, which don’t describe the variety of stars within the main sequence.