Wednesday, 10 April 2019

First ever picture of Black Hole

First ever picture of Black Hole

First ever picture of Black Hole

Here is the first picture of super massive black hole which is almost 6.5 billions time bigger than sun and almost 53 million light years from Earth.This picture is taken by Event Horizon Telescope.

A black hole is a region of spacetime exhibiting such strong gravitational effects that nothing—not even particles and electromagnetic radiation such as light—can escape from inside it. The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.The boundary of the region from which no escape is possible is called the event horizon. Although the event horizon has an enormous effect on the fate and circumstances of an object crossing it, no locally detectable features appear to be observed. In many ways a black hole acts like an ideal black body, as it reflects no light. 

Moreover, quantum field theory in curved spacetime predicts that event horizons emit Hawking radiation, with the same spectrum as a black body of a temperature inversely proportional to its mass. This temperature is on the order of billionths of a kelvin for black holes of stellar mass, making it essentially impossible to observe. (Wikipedia)

Telescope (EHT), is our first ever picture of the black hole that sits inside Messier 87 (M87), a galaxy located 53 million light-years from Earth.

The image was created using radio astronomy. Most radio astronomy is done using large dishes that capture radio waves hitting Earth. But creating an image of the black hole required a telescope quite a bit larger. Researchers needed one the size of our planet.

That’s why the Event Horizon Telescope combined measurements from radio observatories on four separate continents. The array is currently made up of sites in North America, South America, Europe, and Antarctica, with other locations being included over its lifecycle. When all dishes take measurements at the same time, they can be combined into a conglomeration of data, similar to what’s taken on a smaller scale in radio dishes.

The reveal of this picture brings an end to many theories regarding black hole.This picture is a huge milestone in the study of black hole and I am sure that that we will learn alot from this discovery.
Source - (MIT Technology Review )

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