News By/Courtesy: Nikitha M | 01 Aug 2020 14:47pm IST

HIGHLIGHTS

  • Formation of Black Holes
  • Identification of black holes
  • Some facts about black holes

Stars use fuel to burn during their lifetimes and once the hydrogen that fuels the stars gets used up, the stars use helium as a fuel when there is no more fuel the star collapse. When a star dies and collapses the core of the star begins to compress to its gravitational center and it becomes denser and denser over time. The dense object that pulls all materials towards it is now called a black hole. The largest kind of black holes in the supermassive black holes. Scientists believe that supermassive black holes are formed differently than stellar black holes, which are formed from dying stars. These black holes may be the result of combinations of blackholes after collusion[i]s or they must have just grown over time. These kinds of black holes are usually found at the center of a galaxy and scientists usually believe that they must have been formed when galaxies were formed.

No light of any kind can escape from inside the event horizon of the black hole and therefore they cannot be seen. According to NASA’s study, black holes can be identified by looking at the surrounding environment. When materials are close to the event horizon, matter heats to a million degrees as it is pulled towards a black hole and when this happens it glows in X-rays. The immense gravity of black holes makes it possible to see an invisible gravitational pull on stars and other objects.

Here are some interesting facts about the black hole:

  1. The most distant black hole ever found in the Milky Way is 13.1 billion light-years from Earth and it is called Sagittarius A*. It is at the center of the Milky Way galaxy.

  2. A black hole can't pull an entire galaxy into it.

  3. According to Prof. Albert Einstein’s General Theory of Relativity, if we ever got into the event horizon, our perception of space and time would change and the immense gravity of the black hole would compress us horizontally and stretch us vertically like a noodle and that is why scientists call this phenomenon as spaghettification.

  4. The sun is not massive enough to explode or collapse and hence it can never turn into a black hole.

  5. As compared to the size of a galaxy, the size of the region where a black hole has gravitational influence is very limited and hence the universe cannot be swallowed by the black hole.

  6. According to Prof. Stephen Hawkins, black holes get bigger by eating up material and so they also slowly shrink because they lose tiny amounts of energy called ‘Hawking radiation’. Eventually, black holes will evaporate through Hawking’s radiation but that would take longer than the age of the entire universe.

Black holes are one of the most fascinating features of our universe.

 

This article does not intend to hurt the sentiments of any individual, community, sect, or religion etcetera. This article is based purely on the author's personal opinion and views in the exercise of the Fundamental Rights guaranteed under Article 19(1)(A) and other related laws being enforced in India for the time being.

Section Editor: Pushpit Singh | 02 Aug 2020 0:06am IST


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