HR Diagram

Front

What does the H-R diagram represent?

Back

The H-R diagram (Hertzsprung-Russell 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 are the main regions of the H-R diagram?

Back

The main regions of the H-R diagram include the Main Sequence, Red Giants, Supergiants, and White Dwarfs.

Front

What type of star is Barnard's star?

Back

Barnard's star is a red dwarf star, which is cool, dim, and has a low luminosity.

Front

Which color of visible light has the longest wavelength?

Back

Red light has the longest wavelength in the visible spectrum.

Front

What type of electromagnetic waves have the longest wavelengths?

Back

Radio waves have the longest wavelengths in the electromagnetic spectrum.

Front

What stage of a star's life cycle is a Black Hole?

Back

A Black Hole is the final stage of a massive star's life cycle after it has undergone supernova explosion.

Front

What is the temperature range of a red dwarf star?

Back

Red dwarf stars typically have surface temperatures ranging from about 2,500 to 4,000 Kelvin.

Front

What is the significance of the Main Sequence in the H-R diagram?

Back

The Main Sequence is where stars spend most of their life cycle, fusing hydrogen into helium in their cores.

Front

What happens to a star after it becomes a Red Giant?

Back

After becoming a Red Giant, a star may shed its outer layers and form a planetary nebula, leaving behind a core that can become a White Dwarf.

Front

What is a Supergiant star?

Back

Supergiant stars are very large stars that have expanded and cooled, often found at the upper end of the H-R diagram.