Difference between revisions of "H-R Diagram"
(SEO: short lead above the diagram, fuller description in its own section below it) |
(Regents Exam Questions: released questions that need this table (audit of June 2025 through August 2026 exams and the sample clusters)) |
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== What the H-R Diagram shows == | == 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. | 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. | ||
| + | |||
| + | == Regents Exam Questions == | ||
| + | Released Regents questions that cannot be answered without this table, listed by exam. Each link opens the question with its answer key; the standard is the one the question assesses. The exams through August 2026 were given with the earlier edition of the ESSRT, which has the same table. | ||
| + | |||
| + | {| class="wikitable" style="width:100%; text-align:center" | ||
| + | ! style="padding: 0.5em 1.5em;" | Exam | ||
| + | ! style="padding: 0.5em 1.5em;" | Cluster | ||
| + | ! style="padding: 0.5em 1.5em;" | Question | ||
| + | ! style="padding: 0.5em 1.5em;" | Standard | ||
| + | |- | ||
| + | | rowspan="3" style="background-color:white;" | [[June 2026 Earth and Space Science Exam|June 2026 Earth and Space Sciences Regents]] | ||
| + | | style="background-color:white;" | [[Questions:The James Webb Space Telescope (JWST)|The James Webb Space Telescope (JWST)]] | ||
| + | | style="background-color:white;" | [[Questions:The James Webb Space Telescope (JWST)#q4|Question 22]] | ||
| + | | style="background-color:white;" | [[HS-ESS1-1]] | ||
| + | |- | ||
| + | | style="background-color:white;" | [[Questions:Planetary Transits|Planetary Transits]] | ||
| + | | style="background-color:white;" | [[Questions:Planetary Transits#q3|Question 44]] | ||
| + | | style="background-color:white;" | [[HS-ESS1-1]] | ||
| + | |- | ||
| + | | style="background-color:white;" | [[Questions:Planetary Transits|Planetary Transits]] | ||
| + | | style="background-color:white;" | [[Questions:Planetary Transits#q4|Question 45]] | ||
| + | | style="background-color:white;" | [[HS-ESS1-3]] | ||
| + | |} | ||
Revision as of 17:10, 25 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.
Regents Exam Questions
Released Regents questions that cannot be answered without this table, listed by exam. Each link opens the question with its answer key; the standard is the one the question assesses. The exams through August 2026 were given with the earlier edition of the ESSRT, which has the same table.