How Cold Is Space Without The Sun

Some stars have a mass 60 times greater than our sun and a surface temperature of nearly 45 000 degrees fahrenheit.
How cold is space without the sun. At the distance of mercury it s about 800 degrees fahrenheit. At our distance from the sun that temperature is about 250 degrees fahrenheit. Interstellar space has practically no atoms and so h. Temperature is related to how fast the atoms in a substance are moving.
However the fact is the most common temperature in the observable universe is 2 7 k approx. It s the very diffuse gases and grains that drift through the cosmos whose temperature we can measure. For all practical purposes space has no temperature. Space is just above that at an average temperature of 2 7 kelvin about minus 455 degrees fahrenheit.
It can t move at all. The surface temperature of pluto can get as low as 240 celsius just 33 degrees. But space is mostly full of well empty space. Without the sun or a star why is space so cold instead of neutral.