Black hole :                                                                                      Black hole is an massive object in the universe. where force of gravity is very strong not even a light or electromagnetic waves cannot escape from it. The boundary of black hole is called as event horizon, which is truly cannot see  . when something crosses the event horizon it collapses into the black hole 's singularity which is the mid point of black hole . In there space time and laws of physics cannot apply. scientists theorized several types of black holes are stellar , super massive ,intermediate, miniature. stellar black holes are formed when massive stars die and collapse . The are roughly 10 to 20 times the mass of our sun. There can be millions of stellar black holes in milky way galaxy.  super massive  black holes are giants by comparison  measuring millions and even billions of times more massive than our sun. sagittarius A , the super massive black hole found at the centre of milky wat galaxy has mass of four millions times then our sun and has diameter the distance between the earth and sun .


 Because black hole are invisible the only way for scientists to detect and study them is to observe their effect or nearby matter. This includes accretion disks . A disk of particles that from when gases and dust fall toward a black hole and quasaras, jets of particle that blast out of super massive black hole .Black holes remained largely unknown title in the 20th century .     In 1916 using Einstein's general theory of relativity,a german physicist named karl schwartzchild  calculated that any mass can become a black hole . If it were tightly enough. But it wasn't until 1971 when the theory became reality. astronomers studying the constellation cygnus s1   discovered the first black hole. An untold number of black holes are scattered throughout the universe, constantly wrapping space and time . Altering entire galaxies, and endlessly inspiring both scientists and our collective imagination

   BUY THE BOOK AND READ , IT WILL CHANGE YOUR LIFE :https://amzn.to/3f4pOLW

Comments

Post a Comment

Popular posts from this blog

THE UNIVERSE

Image
The universe is the whole of existence ,all of space , matter , energy and time . The universe is so vast as to be unimaginable , but we do know that it is steadily  expanding following its beginning 13.8 million years ago in an explosive event called big bang .  people used to think of the universe as a giant sphere , but we know that things are not simple . the universe probably has no centre or outer edge . only a fraction of it  the observable universe is visible to us the whole universe may be vastly bigger than this .  The three dimensions of space are " bent " by the force of gravity from matter  in the universe into four dimension that we can't see. this is hard to visualize , so scientists use the metaphor of a  two dimensional rubber sheet to explain the idea . the mass of the universe could bend this rubber sheet in one of three ways , depending on how densely packed with matter the universe is most scientists now think the shape of the universe ...
Read more

Gravity and general theory of relativity

  Gravity and General theory of relativity:                                                         Gravity:                                                                 what is gravity? It is an illusion extract by two objects with non-zero mass. Not only, gravity means the Apple  falls on the earth. You may consider two objects in the space an astronaut and an apple, in this case both two objects pulling other object towards each other. The astronaut pulling the Apple towards him and the Apple pulling the astronaut towards it. This attractive force between any two  masses is called the gravitational force . Gravitational force is an attractive force between any t...
Read more

THE STAR BIRTH

Image
Star birth:                                                                                                                 stars have been forming throughout the universe for most of its life. They  take shape in vast clouds where thousands of stars are born at a time . The clouds that give birth to the stars are cold and dense and consist mainly of hydrogen gas . the newly formed stars are huge spinning globes of hot , glowing gas  mainly hydrogen , with helium and small amounts  of other elements . much of this material is packed tightly into the stars cores ,and it is here that nuclear reaction release energy in the form of heat and light .              ...
Read more