Death Of A Star: Curious Space Facts On Star Life Cycles For Kids! | Kidadl


Death Of A Star: Curious Space Facts On Star Life Cycles For Kids!

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Read these Tokyo facts to learn all about the Japanese capital.

Stars are a wonderful concept.

Star death is an even better concept, where the upper layers or the outer layers of stars get collected and form a planetary nebula. Stars and planets are connected to each other in one way or another.

Stars are born from cloud matter. The clouds and specks of dust that are scattered all throughout the galaxies give birth to the stars. One example of a famous star is the Orion nebula.

The pull of gravity also contributes when it comes to the formation of a star. Although gas and dust are the main elements, sometimes, due to disturbance, these clouds get deep knots, which when combined with the gravitational pulls cause them to collapse, giving rise to something known as a protostar. However, it's impossible to see the death of a star. The stars that we see with our raw eyes are around 4000 light-years away from us. The stars that are brighter and heavier in mass with heavy elements in their core are known to die from supernova collisions. That doesn't mean that every time a collapse happens or an explosion happens, a supernova is involved. Some stars just die and become gas and dust, while others cause supernovae. A supernova happens once every 50 years. The mass of the star has a lot to do with the situation.

The phenomenon of a supernova happens when a star that is five times the size of the sun dies. There are massive stars in the universe, and some of them have heavier elements in their cores than others, although through a space telescope it becomes easier to see a star that is a million years away from the earth. The death of a star has a lot to do with its fuel and the regular fusion of hydrogen inside its core. For example, when a star that is as big as the sun in mass value exhausts its nuclear fuel and hydrogen, it becomes a red giant. Stars often die when they run out of fuel. The mass of the star determines how massive the explosion is going to be. Unlike dwarf stars or neutron stars, a massive star often becomes a red giant at the end of its life cycle. When it comes to star death, if the star is huge in mass, it exhausts its hydrogen fuel very rapidly. However, this causes a problem, when heavier elements inside the star, such as helium, carbon, and iron, don't get the fusion, which leads to another reaction. The same begins with the collapse of the outer layers of the star. That energy is so massive and since it's accompanied by heavier elements such as helium, carbon, and iron, it quirky bursts or explodes as a supernova.

Did you know that we can see planets, stars, and dense matter surrounding Earth due to the Hubble space telescope? The Hubble telescope sees everything in color.

Why do stars die and how are they born?

A lot of factors contribute together to giving birth to a star. The lifecycle of a star is pretty simple when seen that way. A star is born when the dust and gas present in the universe come under the influence of gravity and start to collapse under gravity, and the death of stars happens when they exhaust the fuel in their core.

The same reaction is responsible for bringing a star into existence. Over time, the star forms more defined outer laters and hot cores. Some stars have iron cores. They start gathering more of the amount of gas and dust and energy that follows in the universe. As reaction over time makes the star home to a variety of metals, the star has hydrogen fuel which lasts till its lifetime. As soon as the hydrogen fuel runs out, the life cycle ends. When it comes to forming a star, it's very simple. If a small amount of gas collapses under gravity, a small star is formed. If the same quantity is greater, a large star is formed. One of the most famous stars that we know is the sun. The sun was formed by an average-sized gas cloud. Over time, due to gravity, the star started gaining more dust and bits, which flew into the universe. This is generally how stars gain so much size over time. When stars such as the neutron star are just formed, they are often covered in clouds, which makes it difficult to see them through a telescope. In such cases, infrared light comes into use. Infrared light can pass through the dust and the cloud that surrounds these neutron stars, making it easier for scientists to see them. Coming back to massive stars, the sun is not a massive star, it is rather an average-sized star that has lived for 5 billion years now. It's known for the sun to live for 5 billion more years. Once the sun exhausts its time, it will become a red giant and leave behind a small white dwarf. The white dwarf will be the size of the Earth. When the life of massive stars ends, which are around 10 times the size of the sun, they turn into a red giant due to their excess mass. These massive stars are dense and are constantly burning their fuel. As massive stars in the solar system need more nuclear fuel, they also start burning their nuclear fuel more rapidly, which makes the star die quicker than other planets around them.

What is the death of a star called?

The death of a star is called a planetary nebula. Stars are dense with dust and clouds, and when they start burning their fuel, such as hydrogen, they run out of it and eventually die in space.

If a star has lived for around 5 billion years and dies, we won't know about its death just then, at that moment. Since the star is a million years away from us, it affects our interpretation of the death of the star. We would get to know about its death after 18 billion years. Stars are full of elements such as helium, carbon, and oxygen in their cores and they have a large mass. Their core is often hot and releases more energy. However, a star can only form a black hole during its death if it's very massive in size. A star that is eight times the size and mass of the sun can become a black hole since it contains a lot of heavier elements inside its core.

Supernova explosion in Galaxy

What happens when a star dies?

The death of stars is beautiful and incredible in many ways. Unlike popular myths, stars don't become black holes every time they die. Stars run out of their nuclear fuels, such as hydrogen, and start ejecting energy and elements such as helium, carbon, and iron. A star is called a planetary nebula during these times. If a star like a sun dies, it will expand and become a red giant, and then explode.

Stars are dense clouds of dust, and they also have a lot of elements and fuel inside them. Massive stars collapse or exhaust their life cycles more quickly. Stars turn into red giants and release all the energy or elements they have in their core. Almost all stars have a very hot core. Some stars even have an iron core. Energy from the core is released, and other elements that couldn't get fusion are released. Before a star becomes a red giant, it exhausts its nuclear energy, such as hydrogen. Elements such as helium and carbon start escaping. The red giant then leaves behind a white dwarf.

How is the death of a very large star different from the death of smaller stars?

The death of a star is called a planetary nebula. Stars often leave behind white dwarfs as they die.

If a massive star dies in outer space, which is eight times the size of the sun, its mass, helium, hydrogen, and oxygen can form a black hole. However, a small neutron star just leaves behind a white dwarf. The matter, or the elements which didn't get used in fusion, starts releasing out of the red giant and its life comes to an end. If the mass of the star is less, it just forms a white dwarf upon its death. Many stars just die and turn into white dwarf, since their mass isn't very huge and their core isn't filled with many elements.

Written By
Monika Sharma

<p>With a passion for crafting engaging and informative content, Monika brings a wealth of writing experience to our team. Her Bachelors in Electronics and Telecommunications from Symbiosis Institute Of Technology adds a unique perspective to her work, allowing her to effectively communicate complex ideas in a clear and concise manner. Over the past two years, Monika has perfected her writing skills through her roles as a content writer, content manager, and digital marketer for reputable companies in both the USA and India. This hands-on experience has provided her with a deep understanding of industry trends and best practices, ensuring that the content she produces is always of the highest quality. She stays current with the latest field developments,continuously refining her skills to deliver exceptional content.</p>

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