how cold is space

how cold is space? How cold is space, or how hot is it? First of all; Space is a largely empty environment. So, in a volume of 1 cubic meters of space, most of the time, there's nothing but a few atoms, molecules and a few particles.


Let's say it for benchmarking; At sea level, 1 cubic meters of air in the world has a weight of approximately 1.2 kg and the molecule is found. You see, when compared to our own atmosphere, we can call it empty space, no substance. The temperature of a non-substance-free environment cannot be mentioned.

Scientists say the temperature of space is 2.7 Kelvin, and they're not talking about the temperature of the space gap. What is mentioned here, after the Big Bang, is the wavelength of the fossil beam emitted when the light first appeared and came to the present.


In other words, this glow; -it is equivalent to the light emitted by an object of temperature of 270.4 degrees. You know, we can't see it, but. The objects emit light (photon) at any temperature. It; It's called "Black body radiation." Although there is no warmth in space, atoms found in the content of a very small number have a certain temperature.

If you are far enough from a star and you are not receiving almost any energy, the minimum temperature value of the rare atomic particle in the empty space in that area is around 2.7 kelvin. However, most of the sparse atomic clouds found in the space cavity and hydrogen and helium gas in plasma form the temperature of hundreds of thousands and sometimes millions of degrees.


When I say sparse here, we're talking about something really rare; Even the cloud formations you see in the nebula consist of about 20-50 atoms in the cubic meters area. Now you can think of the question. If space is a space, how can these clouds of gas remain at a temperature of hundreds of thousands of degrees, even though there is no power in the heater. We'il explain.


The heat is essentially an energy type. Basically, we can say the "vibration" rate of the atom that creates the substance. The atom vibrates, if it "contacts" with another atom, it transmits its vibration to it. We call it heat transfer. The heat transfer rate of each element differs differently, some are few, but ultimately they all transmit the heat in a way "through contact". Think of two pieces of metal that are 100 degrees and one at 0 degrees. When you change these, the heat flow begins from the 100 degree metal part to the 0 degree metal part. This transmission continues until both metal pieces reach equal temperatures, i.e. 50 degrees Celsius. After that, the transmission stops, because the vibration ratios of the atoms in both metal parts are synchronized. There's nothing left for someone else to give.

So how is the world going to get cold in empty space, if the sun Fade the "heater"? It will be worth the "what" to be able to transfer its temperature. As you can imagine, there is no place where the earth can lose its heat through contact. Because space is completely empty, there is no place where you can contact other than the very few molecules and particles in the void. We believe in our daily judgment because we are not familiar with the vacuum environment, i.e. an environment that does not contain any substance like space.

We all know that if a cup of hot tea stays out for 15-20 minutes, it cools. Because, the surface of the tea cups and teas is in contact with our very dense atmosphere. Heat transfer of hot tea to the glass and every atmospheric molecule that touches the surface occurs. On Earth, near sea level, the weight of the air in a 1-cubic meters area is around 1.2 kg. So our tea cup loses its heat in 15-20 minutes by continuously contacting millions of air molecules with the weight of the atmosphere, and it comes to the same temperature as the surrounding air.

However, when you leave the same tea cup in the space cavity (because there is no pressure, we ignore that the water in the tea will become gas), this is not the case. There is no atmosphere to transmit heat by contacting hot tea molecules. It's too much power to lose heat because it's not in touch anywhere. Therefore, a very hot tea in the space gap remains very hot for hours.


Now you must have something in mind: "Thermos"... Yes, space is a vast thermos. Our Termosas work with the same principle, simulating space gap.


And if we can't get anywhere in space, how do the bodies get cold? The answer is that the second mechanism that causes heat loss is hidden: every object, but each object is "radiant". We humans even heat our environment just like the sun because of our 37 degrees of warmth. In fact, the heat we emit is much more than the sun's mass is spreading with us.

Now, do you understand how heat-sensitive thermal cameras can see people in the dark? Actually, they see my beam, not our heat, because of our heat. What we said, heat is a form of energy. Any substance that spreads energy around it, regardless of contact, with my beam, or whatever the way it is. However, heat dissipation through radiation is much more inefficient than heat loss through contact.

Cooling through the radiation of an object takes a long, much longer time to cool through contact. Therefore, the white dwarfs, who are no longer generating energy, continue to shine for billions of years. They don't cool easily. You must have understood something else from here. From a star in space you can come through heat energy but through radiation. You can only lose that energy through radiation. It doesn't freeze so fast, you'll be cold.

Note: This page has been translated. Could be a word error. Please consult your specialist

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