What is a "main sequence star"?
A) a star that falls in a band in a band on the H- R Diagram with most other stars
B) a star that is aligned with many other, similar colored stars
C) a star that shows the same trend in distance from earth and temperature as many other stars
D) a star that is in a group of stars with similar ages and sizes
E) a star that is statistically indistinguishable from 90% of all stars

Question

Quizplus · Accepted Answer

A main sequence star is a star that is in the band of stars on the H-R Diagram where most other stars are located. This band is known as the main sequence and represents stars that are actively fusing hydrogen into helium in their cores.

What Is a "Main Sequence Star