The galaxy or space is silence and cold?

Question

silence is due to vacuum but what could explain the cold temperature? and what's the coldest temperature recorded?

Answer 1

Silence is defiend as the "lack of audible vibrations".

SIlinece can also be do the the fact that nothing is happening. Sounds must be CAUSED.

Since there is no air in a vacuum, sound cannot be transmitted in that manner.  But sound can be transmitted through solid objects like metal or plastic.  So if an alien knocked on the door of a space shuttle, the people inside WOULD hear it, even though the alien and the space shuttle are both in a vacuum (or close to it).

And a vacuum has nothing to do with "being cold".  "Heat" (temperature) is defined as the presence of kinetic energy in molecules.  So a spacecraft or satellite will be frozen cold on one side not facing a sun and boiling hot on the other side facing a sun.  This causes thermal expansion, which can rip things apart.  This IS a major problem with things like the space shuttle and the space station, but fortunately, both of them orbit the earth evey 90 minutes, so the have a day time and a night time every orbit, thus helping to keep the space craft from tearing apart.

The coldest POSSIBLE temperature is -459.67 degress Fahrenheit.  This is called absolut Zero.  "Temperature" is defined as the amount of kinetic energy stored in atoms, and at this temperature ALL atomic movement stops -- even the atom's "spin".

But no one has ever actually been able to make an atom that cold. The coldest temperature every records was about -459.60 degrees -- just a few thousands of a degree above Absolute Zero.

Obviously, men can't live at that temperature!  In fact, that temperature can be reached ONLY in a laboratory.  Even in deep space, there is SOME kinetic energy, and deep space (between galaxies) has a temperature of about -350 degrees -- a lot warmer than Absolute Zero.

Answer 2

Cold?  It is the absence of heat.   There is no furnace in space.

Answer 3

Warmth comes from the sun.  The further you are from the sun, or other suns, the colder it is going to get.

I found a link for you on the subject:  "If we put a thermometer in darkest space, with absolutely nothing around, it would first have to cool off. This might take a very very long time. Once it cooled off, it would read 2.7 Kelvin. This is because of the "3 degree microwave background radiation." No matter where you go, you cannot escape it -- it is always there. "