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Solar System Temperature Reference |
| Kelvin | Degrees C (Celsius) |
Degrees F (Fahrenheit) |
Remarks |
|---|---|---|---|
| 0 | -273.15 | -459.67 | Absolute Zero |
| Some picokelvins | -273.15~ | -459.67~ | Lowest achieved in a lab |
| 2.725 | -270.5 | -454.8 | Cosmic background microwave radiation |
| 4.2 | -268.95 | -452.11 | Liquid helium boils |
| 14.01 | -259.14 | -434.45 | Solid hydrogen melts |
| 20.28 | -252.87 | -423.16 | Liquid hydrogen boils |
| 35 | -235 | -390 | Neptune's moon Triton surface |
| 63.17 | -209.98 | -345.96 | Solid nitrogen melts |
| 72 | -201 | -330 | Neptune 1-bar level |
| 76 | -197 | -323 | Uranus 1-bar level |
| 77.36 | -195.79 | -320.42 | Liquid nitrogen boils |
| 90 | -180 | -300 | Saturn's moon Titan surface |
| 90.188 | -182.96 | -297.33 | Liquid oxygen boils |
| 100 | -175 | -280 | Planet Mercury surface, night |
| 134 | -139 | -219 | Saturn 1-bar level |
| 153 | -120 | -184 | Mars surface, nighttime low |
| 165 | -108 | -163 | Jupiter 1-bar level |
| 195 | -78.15 | -108.67 | Carbon dioxide freezes ("dry ice") |
| 273.15 | 0.0 | 32.0 | Water ice melts |
| 288 | 15 | 59 | Mars surface, daytime high |
| 288.15 | 15.0 | 59.0 | Standard room temperature |
| 373.15 | 100 | 212 | Liquid water boils |
| 600.46 | 327.31 | 621.16 | Lead melts |
| 635 | 362 | 683 | Venus surface |
| 700 | 425 | 800 | Planet Mercury surface, day |
| 750 | 475 | 890 | Uranus hydrogen "corona" |
| 1,337.58 | 1,064.43 | 1,947.97 | Solid gold melts |
| 1,700 | 1,400 | 2,600 | Candle flame, hottest part, approx. |
| 3,500 | 3,200 | 5,800 | Betelgeuse (red giant star) photosphere |
| 3,700 | 3,400 | 6,700 | Sunspots |
| 5,700 | 5,400 | 9,800 | Solar photosphere |
| 7,000 | 7,000 | 12,000 | Typical neon sign plasma |
| 8,000 | 8,000 | 14,000 | Estimated local interstellar medium |
| 10,000 | 10,000 | 18,000 | Sirius (blue-white star) photosphere |
| 15,000 | 15,000 | 27,000 | Saturn core |
| 30,000 | 30,000 | 54,000 | Jupiter core |
| 100,000 - 2,000,000 | 100,000 - 2,000,000 | 180,000 - 3,600,000 | Heliosphere plasma |
| 2,000,000 | 2,000,000 | 3,600,000 | Solar corona plasma |
| 15,000,000 | 15,000,000 | 27,000,000 | Solar core |
| 100,000,000,000 ( 100 billion; 1011 ) | Supernova | ||
| 4,000,000,000,000 ( 4 trillion; 4 X 1012 ) | Quark-gluon plasma | ||
| Melting and boiling points are shown to precision, for pressure of 1 atmosphere. Values for stars, planet cloudtops, surfaces etc. are shown as round numbers rather than precise conversions.
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| Temperature Conversions | |||
|---|---|---|---|
| K = °C + 273.15 | °C = (5/9) X (°F-32) | °F = ( 9/5) X °C+32 | -40°F = -40°C |
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