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.

Tags

NGSS.HS-ESS1-3

Front

What does the spectral class of a star indicate?

Back

The spectral class of a star indicates its temperature, color, and some aspects of its composition. It is categorized into classes O, B, A, F, G, K, and M, from hottest to coolest.

Front

Which spectral class does our Sun belong to?

Back

G

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 are Red stars known for?

Back

Red stars are known for being the coolest stars on the HR Diagram.

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.

Tags

NGSS.HS-ESS1-3

Front

What is a Supergiant star?

Back

A Supergiant star is a very large star that is much more massive than the Sun and has a very high luminosity.

Tags

NGSS.HS-ESS1-3

Front

What is the significance of Barnard's Star?

Back

Barnard's Star is one of the closest stars to Earth and is known for its high proper motion.

Front

How does temperature affect a star's color?

Back

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

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