JimMetalsCeramics
Materials
What is the typical temperature outside the Space Shuttle when it is in orbit?
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Orbit Temperature
- Thread starter JimMetalsCeramics
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> Almost all gases liquify or solidfy by around 20 K. That means that the gas planets in the Solar System are still well above the comsic background temperature.
> Pluto has a mean temperature around 35-50K, still too warm
> Even Sedna, with its solar orbit greater than 76 AU is listed with a temperature of 33K.
TTFN
> Pluto has a mean temperature around 35-50K, still too warm
> Even Sedna, with its solar orbit greater than 76 AU is listed with a temperature of 33K.
TTFN
btrueblood
Mechanical
IRStuff wrote:
> Almost all gases liquify or solidfy by around 20 K. That means that the gas planets in the Solar System are still well above the comsic background temperature.
> Pluto has a mean temperature around 35-50K, still too warm
> Even Sedna, with its solar orbit greater than 76 AU is listed with a temperature of 33K.
TTFN
Um, not sure what your point was. As a measure of what the "temperature" of space is as you move around the solar system, the problem is that some, most or all of the bodies you mention are large enough to have some of the heat input due to radioactive decay at their cores. Now, measuring mean temperatures of rocky bodies, say, below 1km diameter, would give a good indication of a temperature of a "typical" object depending on its orbit/distance from the sun.
BT
> Almost all gases liquify or solidfy by around 20 K. That means that the gas planets in the Solar System are still well above the comsic background temperature.
> Pluto has a mean temperature around 35-50K, still too warm
> Even Sedna, with its solar orbit greater than 76 AU is listed with a temperature of 33K.
TTFN
Um, not sure what your point was. As a measure of what the "temperature" of space is as you move around the solar system, the problem is that some, most or all of the bodies you mention are large enough to have some of the heat input due to radioactive decay at their cores. Now, measuring mean temperatures of rocky bodies, say, below 1km diameter, would give a good indication of a temperature of a "typical" object depending on its orbit/distance from the sun.
BT
sailoday28
Mechanical
btrueblood (Mechanical) writes
. " Also remember that the typical density of the interstellar medium is .0001 molecule, atom or ion per cubic centimeter; "
At low pressures PV=NRT
N/V= 0.0001/cc R=universal gas const.
New question what is the pressure in outer space?
Then solve perfect gas equation for T
. " Also remember that the typical density of the interstellar medium is .0001 molecule, atom or ion per cubic centimeter; "
At low pressures PV=NRT
N/V= 0.0001/cc R=universal gas const.
New question what is the pressure in outer space?
Then solve perfect gas equation for T
Solar flux at Earth's orbit ~1368 W/m^2
Solar flux at 70 AU ~0.28 W/m^2
Assume 1 m absorbing surface and 2 m emitter surface with emissivity=1. Assume cosmic background of 2.7 K. Solve for equilibrium temperature, ignoring the other stuff: ~40 K
TTFN
Solar flux at 70 AU ~0.28 W/m^2
Assume 1 m absorbing surface and 2 m emitter surface with emissivity=1. Assume cosmic background of 2.7 K. Solve for equilibrium temperature, ignoring the other stuff: ~40 K
TTFN
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