H-R Diagram

Front

What percentage of stars on the H-R diagram are main sequence stars?

Back

About 90 percent.

Front

Which type of star has the coolest temperature on the H-R diagram?

Back

Red Star.

Front

What is the effective temperature of a star related to?

Back

Its color.

Front

Which star has a longer life: a main sequence star or a blue giant?

Back

Main sequence star.

Front

What two factors does the H-R diagram classify stars by?

Back

Temperature and luminosity.

Front

What is the H-R diagram used for in astronomy?

Back

To classify stars based on their luminosity and temperature.

Front

What is the main sequence in the context of the H-R diagram?

Back

A continuous and distinctive band of stars that appears on the H-R diagram, where stars spend most of their life cycle.

Front

What happens to a star's position on the H-R diagram as it evolves?

Back

It moves from the main sequence to other regions such as the red giant or white dwarf areas.

Front

What is luminosity in the context of the H-R diagram?

Back

The total amount of energy emitted by a star per unit of time.

Front

How does the temperature of a star affect its color?

Back

Hotter stars appear blue or white, while cooler stars appear red.