Have you ever wondered you are going to travel to Mars? As a common man, it is near too impossible for thinking about the situation but NASA had started a new program called Send Your Name To Mars. Under this program, NASA has started an online form filling. Link to this program will be given. To send your name to mars you have to just go through the link which I will provide you. If you do not know how to fill the form, fill your form with the science behind science- Here is the link "Send Your Name to Mars: Future Mission" Fill the form fast and make your friends jealous of the boarding pass. But don't make them that jealous share th e link to your friends and family as fast as possible. The link is given here for how to fill form and link for the form:- Share the link fast because forms are filling fast:- https://truesciencebehindscience.blogspot.com/2021/02/send-your-name-to-mars-mars-2020.html First, you have to go through the link given below: The link will direct...
As we have read about the star's life cycle but, there are some ends for it which we will know today. If you haven't read the previous posts check the link, What are the stages of a star's life?. Today we are learning about some alternative endings for a star. Lets, dip into science behind science -
There are almost five endings for it.
- Brown dwarf star
- White dwarf star
- Black dwarf star
- Neutron star
- Black hole
We will know about them one after the other. We shall start with the brown dwarf star.
1. Brown dwarf Star
These stars are a type of star which was not able to gather much dust and fuel when it was living its earlier stages of life as a protostar. Their core is not enough dense, have enough pressure, or enough temperature to convert hydrogen to helium so they crush Deuterium (heavy hydrogen isotope) to make helium. They do not last more than 10 million years. Then, they turn up to be a huge planet having a mass almost 13 times Jupiter.
2. White Dwarf star
When the sun-like stars get out of fuel they have two ways either to be a white dwarf or a planetary nebula. White dwarf spreads light but its fuel is finished because of its history. The average mass of this star is about half of the sun and size is about the earth and their density is very high (3rd densest object in our universe). They further turn up either to be a planetary nebula or black dwarf star. Or if some nuclear fusion is going inside it and it's made up of carbon and oxygen then it will lead to supernovae and then to the nebula.
Its best example is Sirius B star.
3. Black dwarf star
As the white dwarf's all reserve heat and light get extinguished. Scientists have calculated the time taken by a white dwarf to become a black dwarf which is a hundred million billion years. As this period is more than the age of the universe (13.8 billion years) so, it's expected that till today there are not any of the black dwarf stars.
As we know that when a white dwarf gets cooled it leads to the black dwarf. So, it is clear that the temperature will be very less. It is a highly dense ball having a size of earth but the mass of the sun is made up of carbon and oxygen. Eventually, they will freeze into a solid ball of mass.
4. Neutron star
After a star of mass 1.3 to 3 solar masses run out of fuel and the huge explosion takes place known as a supernova. This causes the formation of a neutron star. The gravitation force of neutron star has overcome the power of resistance of electrons to collide with the proton. The compression of the electrons towards protons forms neutrons. The neutron star is 95% made up of neutron other 5% is a proton, as the electron's mass is negligible.
Let us take an example, there is a neutron star whose mass is 1.4 times of the sun and its diameter is just 20 km! Can you imagine how dense will it be? For reference, a teaspoon full of a neutron star's matter will weigh a billion tons! on earth (2nd densest object in our universe). Its gravity is also very high which is unimaginable. They release omnipresent particles called the neutrino.
Pulsar is also a type of neutron star spinning at a very high rate (37920 Rpm) and highly magnetized. All other properties are the same as the neutron star.
5. Black hole
After a star of mass, more than 3 solar masses run out of fuel and the huge explosion takes place known as a supernova. Then, forms the prodigious black hole. Nobody knows what do exist inside the black hole but it is clear that a black hole consists of dark matter and dark energy.
In their starting phase, the black hole can be the size of an atom but later can be of our solar system, its mass is always in increasing order. When it was atom-sized then only its mass can be as higher as of earth and later can be infinity. Black hole is the densest object in the universe till now which is completely made up of dark matter. Its gravity is on the peak can be infinite nothing can escape from it including light. So, the mass of a black hole is infinite, the density is infinity, gravitation is infinite, etc. Hence it is called massive destruction.
Young black holes differ from the old ones based on size, mass, density, gravity everything. Scientists predicted that the end of the universe will be the black hole only. But, don't worry it will be after several billion years.
So, every star we see in the night sky is not the same at all.
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HAIL MOTHERLAND
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