Hertzsprung-Russell Diagram

Front

What does color tell us about a star?

Back

Its relative temperature.

Front

What does luminosity tell us about a star?

Back

Its relative size.

Front

What does the 'Main sequence' represent on the Hertzsprung-Russell Diagram?

Back

A continuous and distinctive band of stars that appears on plots of stellar color versus brightness.

Front

What type of star has a surface temperature of 30,000°K and a luminosity of 10⁻²?

Back

White dwarf.

Front

What type of star has a surface temperature of 5,700°K and a luminosity of 1?

Back

Main sequence.

Front

What is the Hertzsprung-Russell Diagram used for?

Back

To classify stars based on their luminosity, color, temperature, and evolutionary stage.

Front

What are red giants?

Back

Stars that have expanded and cooled, resulting in a reddish appearance and high luminosity.

Front

What are blue giants?

Back

Massive stars that are very hot and luminous, appearing blue in color.

Front

What is a white dwarf?

Back

A small, dense star that is the remnant of a low to medium mass star after it has exhausted its nuclear fuel.

Front

What is a brown dwarf?

Back

A substellar object that is too small to sustain hydrogen fusion in its core.