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

Question

Quizplus · Accepted Answer

A main sequence star is a star that is actively fusing hydrogen into helium in its core. These stars are in a stable state and have a predictable relationship between their temperature and luminosity, causing them to fall within a specific area on the Hertzsprung-Russell diagram called the main sequence.

What Is a "Main Sequence Star