HR Diagram

Front

What is the HR Diagram?

Back

The HR Diagram (Hertzsprung-Russell Diagram) is a scatter plot that shows the relationship between the stars' absolute magnitudes or luminosities versus their stellar classifications or effective temperatures.

Front

What are the main categories of stars in the HR Diagram?

Back

The main categories of stars in the HR Diagram include Main Sequence, Giants, Supergiants, and White Dwarfs.

Front

What is a Main Sequence star?

Back

A Main Sequence star is a star that is in the stable phase of its life cycle, where it fuses hydrogen into helium in its core. The Sun is an example of a Main Sequence star.

Tags

NGSS.HS-ESS1-1

Front

What type of star is the Sun classified as?

Back

The Sun is classified as a Main Sequence star.

Front

What is a Supergiant star?

Back

A Supergiant star is a very large star that is much brighter than a Main Sequence star of the same temperature. They are found at the upper end of the HR Diagram.

Tags

NGSS.HS-ESS1-3

Front

What is a White Dwarf?

Back

A White Dwarf is a small, dense star that is the remnant of a star that has exhausted its nuclear fuel and shed its outer layers.

Front

Which color of star is the hottest?

Back

Blue stars are the hottest stars, with surface temperatures exceeding 30,000 K.

Front

Which color of star is the coolest?

Back

Red stars are the coolest stars, with surface temperatures around 2,500 K.

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 or white, while cooler stars appear red or orange.

Front

What is luminosity in the context of stars?

Back

Luminosity is the total amount of energy emitted by a star per unit of time, often measured in watts.

Tags

NGSS.HS-ESS1-1