1. On an H-R Diagram, what is the main sequence?

On the left are hot stars, and on the right is cold. At the top are bright and at the bottom are dim.

2. What percentage of stars are main sequence stars?

90 percent of the stars are main sequence.

3. Is the Sun a main sequence star?

Yes the sun is a main-sequence star.At the top are the bright stars, at the bottom are the dim stars, at the left are the hot stars, at theright are cold stars.

4. What will happen to the Sun next? When will this happen?

The sun will become a dim, cold, red-giant.

5. Include a picture of an H-R Diagram. Explain it.