? Does the sun have a voice? Why can't we hear it
The sun consists of a group of internal and external layers, the first of which is the core in its center, where the temperature there is between 15-20 million degrees Celsius. It is the hydrogen nuclear reactor that sends its energy out through the transparent radiation layer to reach the convection layer that boils the material until it raises it to the surface where The photo layer that we see is yellow in color due to its temperature of six thousand degrees.
This layer is the lowest temperature among all the other layers below or above it. Then comes the solar atmosphere, the color layer (chromosphere) with a temperature of ten thousand degrees, then the solar corona (corona), whose temperature rises to approximately two million degrees Celsius or more.
The surface of the sun, or the photovoltaic layer, is characterized by the abundance of solar granules on it. These granules are the boiling peaks of the sun’s plasma, with an average diameter of 1,500 kilometers. Each one of them lives for a period ranging between eight and twenty minutes before disappearing.
?Does the sun have a voice
Because of their fluctuating movement, they emit different sound waves depending on the size of each one, as do the solar winds that blow high in the atmosphere, surface flare-ups, coronal mass ejections, and other manifestations of solar activity that lead the solar atmosphere to become turbulent and emit a tremendous sound noise.
The sun, like other stars, is a loud, natural fusion reactor. Of course, the sun has a sound, and many sounds. It is a very huge stove that boils with more matter and more intensely than we know of any boiling on Earth.
It is like a cauldron that roars in vain. A person would be deaf if he heard it from a nearby place, but he would not do so because he cannot reach it because of its enormous temperature that melts all materials.
The lengths of the sound waves issued vary depending on their source and location, but because of the space between us and the sun, we do not hear these sounds. However, there are many sound waves that are issued at wavelengths that do not fall within the range of hearing of the human ear, which ranges between (20-20,000) hertz, but rather at wavelengths Long, radio waves.
Because the definition of sound is a disturbance in the transmitting medium, and not just in the air, it has been found that the sun, due to the permanent disturbances in the convection layer below its surface, emits waves that damage the entire sun from within within just five minutes.
Which means that the frequency of this wave is 0.0033 Hz, which is much lower than what we can hear with our ears, but it can be picked up by the radio and transmitted in a vacuum in the form of an electromagnetic wave, along with the rest of the waves emanating from the atmosphere and its various activities.
But of course we cannot hear it because of the vacuum that prevents us from transmitting its sound to us. This is because sound waves need a transmitting material medium to transmit them, and that is after they cause longitudinal vibrations in it, which carries them on board until they reach our eardrums so we hear them. Despite this, we were able to hear the sound of the sun, even And recording it as well. How was it possible to do that? Have you ever heard the sound of the sun?
In the purely scientific concept, there is no vacuum in space between the Earth and the sun. Rather, there is a solar atmosphere that extends for billions of kilometers, there is an terrestrial atmosphere that extends beyond the moon, and there are cosmic rays that come from all directions.
The average density of all this gas is only 1-3 molecules per cubic centimeter, which is a very small density. It can even be considered zero or pure vacuum when compared to the density of the Earth’s atmosphere near the Earth’s surface, which amounts to 7 x 10^19 (27 million trillion) molecules per molecule. A cubic centimeter. Thus, space cannot transmit sound waves coming from outside the Earth.
The Solar Space Telescope (SOHO), a joint project since 1995 between the American space agencies (NASA) and the European space agency (ESA), and before it a group of ground-based radio telescopes, recorded all wavelengths coming from the Sun through the receivers on board.
These are very long waves (a few hundred kilometers), then scientists converted them into audible waves suitable for human hearing, so it became possible for us to hear the sound of the sun and even the sounds of stars and star explosions because of this great radio technology.
If someone tries to scream in space, the sound of his screaming will certainly not be heard. It is a proven scientific fact that sound only travels through solid, liquid, or gaseous media. Despite this, there are many noisy sites in the space of the solar system thanks to their possession of media that allows waves Sound propagates, such as the atmosphere and oceans.
?How do sounds travel in space
Sound is defined in physics as a mechanical disturbance that spreads in material environments and is transmitted in the form of longitudinal waves and repetitive vibrations measured in the hertz unit, as particles colliding with each other carry these waves to different places. The types of sound waves differ according to the medium in which they are transmitted, and the frequencies of sounds that the human soul can transmit range. It can be heard between 20 and 20 thousand hertz.
Although the space between the planets and stars is not completely empty, the gas and dust particles are distributed lightly and ineffectively, as it is considered a continuous, transmitting medium that allows sound waves to be transmitted directly. On the other hand, in some locations in the solar system, there may be very noisy locations that have a medium that allows them to spread, such as the atmosphere. And the oceans.
Sound is transmitted in the form of electromagnetic vibrations in waves that are not direct sound, but with the development of science, it has become possible to hear these sounds through special instruments designed by NASA, which capture sounds in space.
Here are some examples of planets that make their own sounds:
Sounds coming from the moon Titan and comet 67P: In 2005 AD, the European Huygens spacecraft landed on the largest moon of Saturn, Titan. It recorded sounds indicating the surrounding wind hitting the spacecraft as it floated on the surface, and it was a useful experience. To learn how Titan's atmospheric pressure changes, it can then be used to predict a model of Titan's rotation around Saturn.
Sounds of Jupiter and Saturn: There are sounds coming from Jupiter and Saturn's rings, and these sounds are not in the form of direct recordings, but rather in the form of electromagnetic vibrations that are transformed into very strange audio signals.
Sounds of the planet Mars: The sounds of the planet Mars are similar to the sounds detected by a microphone in a desert. For example, the sedimentation of sand grains on the surface of Mars emits sounds, and the varying speed of the wind also emits sounds. NASA was able to monitor these sounds through the Opportunity rover, which lasted for 11 years. As in the case of Jupiter and the rings of Saturn, the sounds were not received directly from Mars, but rather the waves were analyzed and translated into audio form.
Future plans for hearing planetary sounds
A mission was sent to Mars in 2020 AD for the purpose of hearing Martian voices using a new, specialized microphone. It is a tool that is distinguished by the fact that it does not measure acceleration, as was the case with Titan and Mars microphones previously, but rather works by measuring the chemical composition of rocks and soil by vaporizing them using laser-stimulated spectroscopy. The way it works is to fire a laser at the target, and the target explodes like plasma, producing a very sharp pressure wave. These signals are directly proportional to the mass that was destroyed, and a large group of sounds will be selected for study on Mars.
Source : websites