Practicing with HR Diagrams

Front

What is an HR Diagram?

Back

A graphical tool that astronomers use to classify stars based on their luminosity, color, temperature, and evolutionary stage.

Front

What are Main Sequence Stars?

Back

Stars that are in a stable phase of their life cycle, fusing hydrogen into helium in their cores.

Front

Which stars are the hottest?

Back

Blue stars are the hottest stars in the universe.

Front

What is a White Dwarf?

Back

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

Front

What is a Blue Supergiant?

Back

A very large and hot star that has a short lifespan, often ending in a supernova.

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What is a Red Dwarf?

Back

A small and cool star that has a long lifespan, often billions of years.

Front

What is a Supergiant?

Back

An extremely large star that is very bright but not necessarily the hottest.

Front

What is the significance of the Main Sequence in the HR Diagram?

Back

It represents the majority of stars, where they spend most of their life fusing hydrogen into helium.

Front

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

Back

A star's color indicates its temperature; blue stars are the hottest, while red stars are the coolest.

Front

What happens to a star after it exhausts its hydrogen fuel?

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It evolves into a red giant or supergiant, depending on its mass.