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10 hypothetical stars you don't know about

Blue Dwarf :- It is theorized to be developed from a red dwarf when it looses most of it's hydrogen supply.We haven't found any blue dwarf because red dwarf fuses their hydrogen slowly and currently the universe might not old enough to produce any blue dwarf. Black Dwarf  :- It is thought to be the come from a white dwarf which has exhausted all it's fuel and heat energy which now no further emits radiation and are very hard to detect, fortunately, it do retain it's mass allowing scientists to study it's the gravitational field. It is concluded that the time required for a black dwarf to be formed is longer than the age of the universe thus we haven't found it yet. Frozen star :-There is a probability that this star will form in the distant future when the abundance of heavier metals will be more than it is today which is known as the metallicity of the interstellar medium. It is calculated the temperature of this star will be 273 K or 0-degree celsius. T...
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Here is the list of five habitable planets we have found so far :-

1.)   Gliese 667Cc  Gliese 667Cc is an exoplanet found on 21 November 2011. It is the member of a triple star system Gliese 667. It is situated in Scorpius constellation approximately 23.61 light-years away from the planet earth.  It has an orbital period of  28 earth days. It is also known as  HD 156384Cc. The exoplanet was found using the radial velocity method.  It is approx 3.7 times heavier than the the earth.  2.)   Kepler-186f It was found on 17 April 2014 by Elisa Quintana. Kepler-186f is an exoplanet orbiting a red dwarf 582 light-years away from the earth. It has a radius of 7,454.1 km with an orbital period of 130 days. It is the first planet with discovered in habitable zone which has a roughly equal radius with that of our earth. The discovery of Kepler - 186f confirms that the habitable planets like our earth exists somewhere in the universe.  Kepler-186f is situated in the constellation of Cygn...
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Types of black hole

What is a black hole ? A black hole in space is a region where the gravitational force is so strong that even light can not escape it.  Any matter which comes under the influence of a  black hole will be crushed down to a confined space and is being eaten by the black hole.  Black holes are formed when a star dies. Not every star can become a black hole only which have mass 1.4 times the mass of our sun. ( approx   2.8E30). A few black holes are orbited by the other heavenly bodies and are slowly eaten away by the black holes.  As the matter falls towards the event horizon it gets heated due to the increasing gravitational pull and the friction and forms a bright circular disc around the black hole known as Assertion disc .   On the basis of mass and sizes black holes has been divided into four categories:- 1.) Stellar black holes   When a star with a mass range from five to several tens times of the solar masses c...
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