How cold is space, does it ever drop to absolute zero and what happens if you fall into it without a spacesuit?
Though sci-fi movies would have us believe that space is incredibly cold — even freezing — space itself isn’t exactly cold. In fact, it doesn’t actually have a temperature at all.
Temperature is a measurement of the speed at which particles are moving, and heat is how much energy the particles of an object have. So in a truly empty region space, there would be no particles and radiation, meaning there’s also no temperature. Of course, space is full of particles and radiation to produce heat and a temperature. So how cold is space, is there any region that is truly empty, and is there anywhere that the temperature drops to absolute zero?, which contain all the conditions to kick start nuclear fusion.
Things really warm up when radiation from a star reaches a spot in space with a lot of particles. This gives the radiation from stars like theis a lot warmer than the region between our planet and its star. The heat comes from particles in our atmosphere vibrating with solar energy and then bumping into each other distributing this energy. — closest to the sun — is blisteringly hot during the day and frigidly cold at night. Its temperatures drop to a low of 95 Kelvins .
A false color composite image of the the surface temperature changes on the surface of Uranus, taken by Voyager 2.
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