stellar spectra The Hertzsprung- Russel diagram a.k.a. HR diagram Vertical axis: L * Horiz. axis: T s * color of the star.

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Presentation transcript:

stellar spectra

The Hertzsprung- Russel diagram a.k.a. HR diagram Vertical axis: L * Horiz. axis: T s * color of the star

The Hertzsprung- Russel diagram a.k.a. HR diagram Vertical axis: L * Horiz. axis: T s * color of the star

The Hertzsprung- Russel diagram a.k.a. HR diagram Vertical axis: L * Horiz. axis: T s *

Red giants – top right L * very big –He burns hot and fast T s * is low –surface far from core

planetary nebula with white dwarf

Hubble image of Crab nebula

Chandra X-ray image of Crab nebula

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