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Illustration : 3 phases of black hole research

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(Welcome to the second post of “Illustrations on black holes” ,which is a series of illustrations which is based upon & Inspired Stephen Hawking’s BBC Reith Lectures on Black Holes). Phase 1 : Well , actually no one  thought that black holes really exist . In fact , Albert Einstein published a research paper in 1939 suggesting that Black holes couldn’t exist because the matter couldn’t be compressed beyond a certain point. Phase 2 : This phase was actually where research on “Black holes” started & this was led by “John Archibald Wheeler” (he was the mentor of Richard Feynman) , the person who coined the term “Black hole”. This was also the phase in which interest in “Gravitational collapse“ was revived , after World War 2. Phase 3 : The modern phase where existence of black holes have been proved. This phase has been essentially been led by popular science communicator , by the likes of Stephen Hawking & gang ... Join us on : Twitter ( @ ByAal ) , WordPress
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Illustration : What do we know about "Black holes" ?

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Black holes are cool (Welcome to the first post of "Illustrations on black holes" ,which is a series of illustrations which is based upon & Inspired Stephen Hawking's BBC Reith Lectures on Black Holes). So , what do we really know about Black holes :- Black holes are formed out of large dying stars which have mass greater than 1.4 times the mass of sun. Black holes have a point of infinitely large mass density called as "Singularity" . Black holes have a point of no return called as "event horizon" , after which any object cannot return back . No even spherical cows or even light : the fastest known thing in the universe. Black holes are almost invisible , but we know that they exist as they rip apart unfortunate stars which gets too close. Almost 2 billion years ago , 2 black holes collided which created "gravitational waves" , which was discovered by LIGO project , which became a much celebrated scientific discovery.
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Location: Pune, Maharashtra, India
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