Here's how astronomers took the first image of a black hole that's located 55 million light years away

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Following is a transcript of the video.

What you are seeing is the first ever image of a black hole. Maybe it doesn’t look spectacular at first. But consider this: Black holes by their very nature are invisible.

Because their gravitational pull is so strong that not even light can escape them. So for many years, astronomers thought that an image like this was impossible. How do you take a picture of something that does not emit light?

Well, it starts with a small team of innovators. And ends with a telescope that’s unlike anything the world has ever seen. Now, despite major advances in telescope technology there is no single telescope on Earth that can take a picture of a black hole.

They’re all too small. So, astronomers innovated. If one telescope couldn’t do the job, then perhaps 8 would — and they were right. They used 8 radio telescopes stationed at different points across the world. And kept them all in synch with powerful atomic clocks. They call the effort the Event Horizon Telescope.

This series of telescopes, combined, has about the same capabilities as a telescope as large as our entire planet. And for the first time