Front

What is the H-R Diagram?

Back

The Hertzsprung-Russell Diagram (H-R Diagram) is a scatter plot of stars showing the relationship between their absolute magnitudes or luminosities versus their stellar classifications or effective temperatures.

Front

What does the color of a star indicate?

Back

The color of a star indicates its temperature. For example, blue stars are the hottest, while red stars are the coolest.

Front

Which type of star is the coldest?

Back

Red Star.

Front

What is a supergiant star?

Back

A supergiant star is a very large star that is even more massive than a giant star. An example is Betelgeuse.

Front

Where are white dwarfs located on the H-R Diagram?

Back

White dwarfs are found in the bottom left corner of the H-R Diagram.

Front

What is the main sequence in the H-R Diagram?

Back

The main sequence is a continuous and distinctive band of stars that appears on plots of stellar color versus brightness.

Front

Which star is considered the brightest among the following: Bellatrix, Deneb, Polaris, Barnard's Star?

Back

Deneb.

Front

What is the relationship between a star's temperature and its color?

Back

A star's temperature determines its color; hotter stars appear blue, while cooler stars appear red.

Front

What type of stars are found in the upper right corner of the H-R Diagram?

Back

Red giants and supergiants.

Front

What does the term 'luminosity' refer to in the context of stars?

Back

Luminosity refers to the total amount of energy emitted by a star per unit of time.