18 Trivia -- Astronomy

iii. Why a black hole is called the point of no return?

1 Answers

Let us imagine, we are in a spaceship that is somehow passing through the circumference into the horizon, slowly, as the time there runs differently than the people who are currently living on Earth. Now, at this point in time, we will be attracted to the horizon, most likely, but for now somehow, just imagine we didn’t get pulled by the Horizon as we are having a higher escape velocity than that of the horizon. Now once we get past the horizon into the mass of the black hole, we will be facing a very different time zone, that is, we will be facing a space-time singularity where time hardly moves, now this place is known as space-time singularity for a purpose that is at that place we consider the space and time as dimensions, that make us able to travel back and forth in time. Coming back to the question, once anything that gets into a black hole doesn’t go out, now if we try to send out any signal it will not go past the horizon as not even light can pass through it. And if we are not in the space-time singularity and has just passed the circumference then the signal would be pulled down by the horizon obviously.

iv. What are the names of Black holes found in our universe?

It is true that black holes can be found in the environment but we are very much safe from the black hole as no black hole quite near our solar system found which can swallow us. But here are some names of the black hole that are said to be found in the universe: TON 616, HOLMBERG 15A, 1C 1101, S50014+81, H1821+643, NGC 4889, RBS 2043, NGC 1600, SAGITTARIUS A*.

i. How did the universe begin?

“If Einstein is correct, then, the universe is created from a black hole,” said by one of the two fathers of black hole, Stephen Hawking. Here he means to say that, Einstein has once said that the universe is expanding at a very high rate with respect to time, if this is true then.

If we go back in time with the same rate as the time is increasing, then we will find that there will be space time singularity that means our universe could have been made by the evaporation process of Black hole....

ii. What’s at the center of the universe?

Well, previously I used to believe that there is nothing at the center of the Universe. I used to think this because no kind of electromagnetic radiation such as Light has ever reached our eyes but then suddenly I remembered that a black hole doesn’t let light pass through it, then I realized that I had been wrong the whole time. There’s something at the center of the Universe, that makes the cluster starts to revolve. I did some research and came to find out that there are evidence that can...

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