promotion image of download ymail app
Promoted
Anonymous
Anonymous asked in Science & MathematicsAstronomy & Space · 1 decade ago

Is space cold?

What's the temperature of space?

12 Answers

Relevance
  • Anonymous
    1 decade ago
    Favorite Answer

    Empty space itself cannot have a temperature, unless you mean some

    abstruse question about quantum vacuums.

    However, if you put a physical object into space, it will reach a

    temperature that depends on how efficiently it absorbs and emits

    radiation and on what heating sources are nearby. For example, an

    object that both absorbs and emits perfectly, put at the Earth's

    distance from the Sun, will reach a temperature of about 280 K or 7 C.

    If it is shielded from the Sun but exposed to interplanetary and

    interstellar radiation, it reaches about 5 K. If it were far from all

    stars and galaxies, it would come into equilibrium with the microwave

    background at about 2.7 K.

    Spacecraft (and spacewalking astronauts) often run a bit hotter than

    280 K because they generate internal energy. Arranging for them to

    run at the desired temperature is an important aspect of design.

    Some people also consider the "temperature" of high energy particles

    like the solar wind or cosmic rays or the outer parts of the Earth's

    atmosphere. These particles are not in thermal equilibrium, so it's

    not correct to speak of a single temperature for them, but their

    energies correspond to temperatures of thousands of kelvins or higher.

    Generally speaking, these particles are too tenuous to affect the

    temperature of macroscopic objects. There simply aren't enough

    particles around to transfer much energy. (It's the same on the

    ground. There are cosmic rays going through your body all the time,

    but there aren't enough to keep you warm if the air is cold. The air

    at the Earth's surface is dense enough to transfer plenty of heat to

    or from your body.)

    • Commenter avatarLogin to reply the answers
  • 1 decade ago

    Space is a completely alien environment to what we are used to. The diffinition of cold or warm is completely different. In earth we say eg. alaska is cold because the average air tempreture is low. However in space there is no air. So heat is no conducted by convection which is the most common way heat is transfered on earth. In space heat is transfered by radiation. Theredore if you put something on space eg in orbit around the earth, it will become very hot when is at the sunlit side of the earth, however when it gets behind the earth it will radiate all the heat it had to outer space and will become very very cold.

    To understand this remember what happens in clear nights of winter? Frost forms on the open grass even if the air temperature is not even near freezing 0. This happens because the grass is radiating all its heat to the eternal cold blackness of the night sky and becomes itself very cold.

    • Commenter avatarLogin to reply the answers
  • 1 decade ago

    Temperature is based on the movement of atomic particals. No atomic particals, there would be no temperature. If one were to try and measure the cold areas of space, the device would probably end up reading it's own temperature (which is what was happening with certain cold fussion experments) till it got so cold, the device itself would freeze and give no reading.

    • Commenter avatarLogin to reply the answers
  • 1 decade ago

    People believe that it is extremely cold what I mean is that space is the coldest place ever known. The farther from the sun the colder. It's allot colder than the north pole. Space is below 0 degrees. Astronauts have to dress very warm when the go to space.

    • Commenter avatarLogin to reply the answers
  • How do you think about the answers? You can sign in to vote the answer.
  • 1 decade ago

    It depends. Mostly cold, but near a star it will get very hot.

    • Commenter avatarLogin to reply the answers
  • Anonymous
    1 decade ago

    Its low enoug to freeze your *ss off!! Literally!! I believe it is like 250 degrees below zero farenheit!!

    • Commenter avatarLogin to reply the answers
  • 1 decade ago

    if it is empty space it is cold

    • Commenter avatarLogin to reply the answers
  • 1 decade ago

    i wouldn't know what the temperature is, but apparantly, it's freezing out there...

    • Commenter avatarLogin to reply the answers
  • 1 decade ago

    yes until you get to a star or something like that

    • Commenter avatarLogin to reply the answers
  • 1 decade ago

    The answer you are looking for is "absolute zero." (Or very close to it.)

    • Commenter avatarLogin to reply the answers
Still have questions? Get your answers by asking now.