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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.

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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