“Why Do Comets Produce X-Rays?” this is an important discovery that changes scientists earlier thinking. We all think that space comets are soft glowing and cold objects as they contain ice and moving in space. When we heard that comets are also able to produce x-rays, we got surprised because x-rays are the form of high energy radiations. Only very hot and energetic space objects like black holes, neutron stars, supernova explosion, etc are able to produce x-rays. If comets are made of ice and dust then “why do comets produce x-rays?” this question rises everywhere. After many years of researching, scientists give some reasons of this fascinating question. When they try to understand “why do comets produce x-rays?” it helps them to learn more about space weather, solar winds and a mysterious phenomena that is happening in our solar system.

Why Do Comets Produce X- Rays?

If you want to understand “Why Do Comets Produce X- Rays?” then you have to know that comets do not produce energy on their own and comets are cold objects they contains dust, ice and frozen gases. X- Rays are usually produced by such objects that have extremely hot environment and energetic. But comets are cols objects so, how are they able to emit high energy radiations, x-rays. The real reason why do comets produce x-rays is the interaction between sun and comets. When the comets pass near the sun, sunlight heats its surface and then its icy surface changes directly into gas and it forms a large cloud around itself and this cloud is called coma. The sun constantly releases the stream of high speed charged particles; these particles are called solar wind. When these charged particles came into the contact of gas cloud, energy exchange takes place. During this process charged particles get excited and when they get stable, they release releases energy in the form of x-rays. This theory explained about “Why Do Comets Produce X- Rays?” properly. “In simple word sun provides energy and comets provide gas and then together they interact with each other. As a result they release energy in the form of x-rays.” This the easiest answer of this question “Why Do Comets Produce X- Rays?”

What Are X-Rays In Space?

Before we discuss about “Why Do Comets Produce X- Rays?” we have to know about x-rays. X-Rays are high energy electromagnetic radiation. X-rays having much energy than visible light have. It can easily passes through many materials that visible light cannot. In space X-rays are only produced by such objects that are extreme hot and highly energetic such as neutron stars, supernova explosion, black holes or sometime stars like our sun. X-rays are invisible; they cannot be seen by human eyes. Comets are made of ice, dust and frozen gases so they are cold in nature. Because of its low temperature, scientists never expected that comets emit such high energy radiation (x-rays). That is why this discovery was so surprising. It completely changed earlier scientists thinking. It forced researchers to think again “Why Do Comets Produce X- Rays?” despite their low temperature.

Why The X-Ray Glow Appears Around The Comet?

Scientists can observe a faint but detectable x-ray glow around the comets by using space telescopes. This x-ray glow is not coming from the solid or the nucleus of the comets. This glow is appears in the large cloud of the comets, called coma. Because cloud gas interacts with the solar wind charged particle. During this process solar wind charged particles capture comets electron and releases energy in the form of x-rays. So that comet solid does not emit x-rays but its cloud emits. This results x-ray glow appears around the comet.  As if cloud is denser then more interaction happens with the solar wind particles and more x-rays produces which causes x-ray glow brighter. It also explains “Why Do Comets Produce X- Rays?”

What Kind Of X-Rays Do Comet Produce?

The x-rays which are produced by comets are having low energy as compare to the x-rays emits by extreme hot and energetic space objects like black holes, supernova remnants or sun like star. X-rays emit by comets are known as soft x-rays because they have low intensity and low energy. But these x-rays are detectable by sensitive space instruments. During the interaction phenomena when comet cloud and solar wind interact with each other; it releases energy in the form of soft x-rays. These x-rays are not causing any danger to our Earth. Instead scientists get valuable knowledge from them about solar wind, comets surrounding and this interaction phenomena happening throughout the space. By studying them deeply, scientists also refine their understanding about “Why Do Comets Produce X- Rays?”

Do All Comets Produce X-Rays?

If you see in theoretical way, yes. But if you see in practical way the answer is no. All comets are not able to emits x-rays or we can say that we can’t detect them doing so. Any comet emit x-rays when it comes near the sun and due to sunlight its icy surface releases gas and it forms cloud called coma around itself. When this cloud and solar wind particles get interact with each other, it produces energy in the form of x-rays. So emission of x-rays depends upon some basic conditions, such as:

1. Distance of the Comet from the Sun:

If it is near the sun then it produces more gas and its cloud becomes denser. Denser cloud interacts with more solar wind particles and it produces strong x-rays which are easily detected by space telescopes. While if the distance between sun and comet is more, then the gas cloud becomes thin. Thin coma means lesser interaction with solar wind particles. So the emission of x-rays is weak or negligible.

2. Size and Activity of Comets:

If the comet is large and more active then it strongly interacts with more solar wind particle and produces strong x-rays. But if the comet is small and inactive gets less interact with the solar wind particle and emission of x-rays becomes weak or negligible.

3. Solar Wind Strength:

X-rays emission is strongly depending upon the solar wind conditions. If the solar winds are active strongly then the coma interacts with it and produces strong x-rays which are easily detect by scientists observation tools. If the solar winds become quiet hen emission of x-rays drops and not detect by instruments.

4. Observation Limit:

It is also an important condition; if the comet is within the limit of our observation tools then we are able to detect its x-rays. But if it is too far from the telescopes then we are not able to detect its x-rays, whether it produces or not.

Most of the comets produce x-rays but only some can do enough to detect. By the lot of observation confirming that this is a common phenomenon. Emission of x-rays is depending upon the environment and the activity of the comet. This further supports the scientific explanation of “Why Do Comets Produce X- Rays?”

Final Thought

So in this article we discussed all about “Why Do Comets Produce X- Rays?” comets do not produce x-rays itself. Comets have to interact with the solar wind to do so. When coma interacts with the solar wind particles; these particles get excites and when they get stable, they releases energy in the form of x-rays. So the conclusion is that comets produce x-rays due to this charge exchange process. This important discovery changes the opinion of scientists about the comets. But still a lot of unknown and mysterious things are remaining to discover. This “Why Do Comets Produce X- Rays?” is only a small page of a vast book. There are many hidden forces are remaining to find out.

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