Difference between revisions of "H-R Diagram"
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|desc=H-R Diagram from the NYS Earth and Space Sciences Reference Tables (ESSRT): star luminosity against surface temperature and spectral class, with the main sequence, giants, supergiants and white dwarfs. Supports HS-ESS1-3. | |desc=H-R Diagram from the NYS Earth and Space Sciences Reference Tables (ESSRT): star luminosity against surface temperature and spectral class, with the main sequence, giants, supergiants and white dwarfs. Supports HS-ESS1-3. | ||
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| − | The '''H-R Diagram''' (Hertzsprung–Russell diagram) from the ''Reference Tables for Earth and Space Sciences'' (ESSRT) plots the luminosity of stars | + | The '''H-R Diagram''' (Hertzsprung–Russell diagram) from the ''Reference Tables for Earth and Space Sciences'' (ESSRT) plots the luminosity of stars against their surface temperature. It primarily supports [[HS-ESS1-3]]. |
| − | [[File:H-R Diagram.png|800px|alt=H-R Diagram from the Earth and Space Sciences Reference Tables (ESSRT): luminosity of stars plotted against surface temperature and spectral class, showing the main sequence, giants, supergiants and white dwarfs]] | + | [[File:H-R Diagram.png|800px|class=img-fluid|alt=H-R Diagram from the Earth and Space Sciences Reference Tables (ESSRT): luminosity of stars plotted against surface temperature and spectral class, showing the main sequence, giants, supergiants and white dwarfs]] |
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| + | == What the H-R Diagram shows == | ||
| + | Luminosity is given in solar units and surface temperature in kelvins, with spectral class (O, B, A, F, G, K, M) and color from blue to red along the bottom. The diagram shows where the main sequence, giants, supergiants and white dwarfs fall and places well-known stars on it, including the Sun, Sirius, Polaris, Rigel and Betelgeuse. Diagonal lines mark stellar size from 10<sup>−3</sup> to 10<sup>3</sup> solar radii, labels along the main sequence give stellar lifetimes from 10<sup>7</sup> to 10<sup>11</sup> years, and an arrow at the right shows mass increasing toward the top. | ||
Latest revision as of 11:18, 13 October 2026
| ⇱ All Earth and Space Sciences Reference Tables (ESSRT) | |
| ← Emission Spectra of Some Elements from Stars | Life Cycles of Stars Model → |
The H-R Diagram (Hertzsprung–Russell diagram) from the Reference Tables for Earth and Space Sciences (ESSRT) plots the luminosity of stars against their surface temperature. It primarily supports HS-ESS1-3.
What the H-R Diagram shows
Luminosity is given in solar units and surface temperature in kelvins, with spectral class (O, B, A, F, G, K, M) and color from blue to red along the bottom. The diagram shows where the main sequence, giants, supergiants and white dwarfs fall and places well-known stars on it, including the Sun, Sirius, Polaris, Rigel and Betelgeuse. Diagonal lines mark stellar size from 10−3 to 103 solar radii, labels along the main sequence give stellar lifetimes from 107 to 1011 years, and an arrow at the right shows mass increasing toward the top.