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Questions tagged [temperature]

Questions regarding the amount of heat energy in an environment, as well as how to measure it.

23
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2answers
20k views

Air temperature and humidity inside the ISS

The International Space Station being an artificial habitat for humans; it seems reasonable to assume the air temperature, and humidity levels are maintained at well-defined levels. What are the air ...
18
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2answers
14k views

How is heat dissipated from a satellite or any metal in space?

All the artificial satellites launched in space have a series of solar cells attached to them. When in use, these panels absorb a lot of radiation from the Sun and put it to use. So, do these panels ...
14
votes
1answer
28k views

What's the typical temperature of a satellite orbiting the Earth?

I've been reading about "cryogenic" vs. "storable" propellants, and specifically the issue of boil-off: If the storage temperature gets above the propellant's boiling point, the propellant boils off ...
9
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1answer
6k views

If Mars had more atmosphere how warm would it be?

Looking at Venus, Earth and Mars, the closer you are to the sun the warmer you are. At the same time the warmer planets also have thicker atmospheres. ...
10
votes
2answers
898 views

How cold are the Voyagers now? Colder than LOX? Colder than SOX?

The MHW-RTG model Radioisotope Thermoelectric Generators on the two Voyager spacecraft started out at about 1000C and 300C on the hot and cold sides, but will have dropped somewhat due to slow decay ...
3
votes
1answer
347 views

Temperature and pressure of rocket exhaust

What is the temperature and pressure of the exhaust that comes out of the rocket during the last three seconds of countdown (smoke that stays near ground)? How much carbon dioxide is there in that ...
15
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2answers
1k views

What would determine the interior temperature of a large space station?

If one calculates the black-body temperature of an object in space, it turns out that it would be at room temperature somewhere between the orbits of Earth and Venus. But due to the greenhouse effect, ...
30
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2answers
5k views

Why cool engines with fuel as opposed to oxidizer?

As I was watching Tom Mueller describe the Merlin engine, he said that the RP-1 propellant is pumped through ribs in the nozzle to regeneratively cool the engine. Also, a video about Copenhagen ...
18
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2answers
960 views

How can any probe be safe at one million degree Centigrade temperature?

Even after going straight inside the sun's corona, how can Solar Probe Plus be safe at the one million degree Centigrade temperature of the sun's corona ?
10
votes
1answer
3k views

What is the temperature inside a methane/oxygen rocket engine?

Assuming a simple rocket engine, with a combustion chamber and de laval nozzle, fueled by liquid methane and liquid oxygen, what temperature must the combustion chamber, choke and nozzle withstand? ...
8
votes
1answer
499 views

Are there seasons on Luna?

I saw a comment that made me curious. The Earth's axis tilt is about 23.4°, whereas Luna's is only 1.54°. There is negligible atmosphere on Luna, and as far as I know although signs of water ...
6
votes
1answer
867 views

Does the temperature near the surface of the Moon rise rather quickly with depth?

I have heard presentations on lunar lava tubes that estimated the temperatures of the ground surrounding them as being well below zero. An article in NASA Science News says this: Once you get down ...
4
votes
1answer
4k views

What's the average temperature on the surface of ISS (International Space Station)

The ISS is about 330-410 km above earth surface and within the thermosphere layer, in which according to Wikipedia the temperature can reach 1500 °C. However the gas inside this layer is highly ...
1
vote
1answer
330 views

How to calculate the stagnation temperature at the tip of the nose of a reentry module?

A re-entry module flies with Mach 10 at an ambient temperature of –27°C with. CP = 840 J/kg-K, gas constant R = 140 J/kg-K. What is the stagnation temperature at the tip of the nose of the re-entry ...
20
votes
2answers
331 views

Is the cupola, on the inside of the ISS, cold or warm to the touch?

Does the temperature of the surface of the cupola vary when the ISS is in Earth's shadow, compared to when it is on day side of the Earth? Is it cold to the touch when the ISS in the shadow?
17
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3answers
3k views

Why does the ISS need thermal blankets if the Sun is hot?

If space is cold at 2.7 Kelvin and heat can't escape in a vacuum then why is the ISS wrapped in space blankets if the sun is hot?
5
votes
1answer
269 views

Parker Solar probe's heat survival - Heat vs Temperature

This is not about about heat shields, materials, coolant, etc. I am not quite not getting the science that explains the Heat Vs Temperature, which is how the Parker probe is going to survive the ...
1
vote
0answers
46 views

Temperature indicators/labels on space debris?

There was a picture in this question about space debris on shore. Seems to be a part of a Falcon 9. The round stickers are used for temperature control. Similar labels are sold by some companies, for ...