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Understand the Background of Aurora Borealis

What is an aurora? Aurora Borealis or northern lights is one of the most beautiful phenomena that nature has given us. It is a natural light display in the night sky. It is mainly observed in the high latitude areas.  It is an impressive and fascinating demonstration of how the very fast-moving charged particles interact with the atmosphere of the earth due to the magnetic field of the earth. It worth bearing the cold outside to experience this unforgettable and soothing scene. It makes you feel connected to nature and the divine. People have often confusion between aurora borealis and aurora australis but there is no difference between except for their location when the lights are observed in north pole then it is called as aurora borealis( or northern lights) and when seen at the south pole it is called as aurora borealis(or southern lights). Illustration of aurora formation What causes this amazing and magical phenom enon?   Our sun is a giant ball of g...
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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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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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