When a black hole swallows a star,it rips it to shreds
When a star passes within a certain distance of a black hole,it could get close enough to be swallowed up by the black hole
The star gets streched and torn apart by the black hole's gravitational pull,the stellar material gets compresed as it is pulled in,this event of star destruction is called 'STELLAR TIDAL DISRUPTION' ,it release an enamous amount of energy ,brightening the surroundings in an event called a flare,this intense flare of light echoes through space
It would last for months or years as the smashed stars gas cools .
The destruction event also emits intense ultraviolet and X-ray light that can destroy everything in its immediate neighbourhood.
Reasearc have recently observed intense wind in the neigbourhood of a black hole called 'V404 cygni' which is located at about 8000 light years away.
V404 cygni is one of the closest black holes to the earth.the black hole which is about 10 times the mass of the sun was swallowing the material of a very nearby star and went into a bright and violen outburst in 2015
After more than 25years of dormacy.each flash of light was blindingly intense
equivalent to the power outpup of about 1000 suns
The intense wind was of a very high speed 3000km/sec ,allowing it to escape from gravitational field of the black hole.
The material sent out by the wind eventually formed NEBULA
The image of a black hole's event horizon was captured last year and it currently under processing
It was captured by the event horizon telescope (EHT) which consist of a global network of several powerful radio telescope, these telescope are distributed around the globe. They are combined together to create a single powerful telescope, the telescope focused on a supermassive black hole called "SAGITTARIUS A" which is located at the centre of our milky way galaxy (25,000 light tears away),
Sagittarius A is 24million km (15million mi) across. It's estimated to be 17times bigger than the sun. The data was collected by the telescope and stored on hardwares and sent to MIT haystack observatory for proper processing. The data are cross compared and analyzed. On a grid computer which is made of about 800 CPUs all connected through a 40Gbits network.
The image is expected to be revealed to the world later this year.
Credit : NASA, ESA, ESO, SXX COLLABORATION
REFERENCES
sciencenews.com
newscientist.com
en.wikipedia.org