what is the tempiter in space?

Answer 1

I assume by "tempiter", you mean "temperature".


Temperature is the measure of the average kinetic energy of the particles of a substance. The higher the temperature, the higher the average KE of the substance's particles, the lower the temperature, the lower the KE.

Space is a vacuum (or near enough). It does not make any sense to speak of the temperature of a vacuum since a vacuum has no particles which to measure their average kinetic energy.

In order the measure the "temperature" of space, one must instead measure the temperature of something placed out in space...like a thermometer. If a thermometer is placed out in space, it will begin to absorb energy from the sun or other stars in the form of electromagnetic radiation (light). In addition, the thermometer will emit electromagnetic radiation (mostly in the IR end of the spectrum). If the rate at which the thermometer emits energy exceeds the rate at which it absorbs it, the temperature will fall. As the temperature falls, the rate at which energy is emitted slows, eventually reaching an equilibrium temperature (rate emitted = rate absorbed).
This equilibrium temperature depends greatly on the location of the thermometer relative to near by heat sources (like the sun). The equilibrium temperature on the dark side of the moon will be well below the temperature measured on the sunny side of Mercury.

At the Earth's orbital distance from the sun, a sun-shielded thermometer will reach an equilibrium temperature of about 5 K (-268.15 degrees C).
Interplanetary space is said to have an equilibrium temperature of about 3 K (2.725 K).

Answer 2

It's a great question.

The cosmic background radiation is about 2.7 K, so that is a good average temperature value for an isolated location in "deep space." There are obviously "hot" spots like stars, etc. If you put an object in the Earth's orbit around the sun it would stabilize at about 280 K because of heating from the Sun.

Some interesting physics shows up when you get into places like molecular clouds where molecules are very sparse and seldom bump into each other. In those places, energy equilibratration is very inefficient. In those places there will actually be several temperatures describing a volume of space... a rotational temperature, a vibrational temperature, etc.

Aloha

Answer 3

About 2.7 degrees kelvin (2.7 degrees above absolute zero, or about -270 degrees celsius). This is because there is leftover radiation everywhere in the Universe that keeps things that warm. Things can get cooler than that, but then they warm back up before long. So the temperature of empty space can be considered as 2.7 degrees kelvin.

Keep in mind that the space itself does not have a temperature because it is not normal matter, that's just the energy level of space and the temperature things placed in space would tend towards.