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This is Scientific American 60-second science.'m Tulika Boz. Today, supermassive news from space.

The first image of the supermassive black hole at the center of the Milky Way,

Sagittarius A-Star, was just released by astronomers this morning. I'm here talking to Seth Fletcher, our chief features editor for Scientific American.

He literally wrote a book on the Event Horizon Telescope and is our resident expert on all things, black holes.

So, Seth, what does it actually take to photograph a black hole?

So, I mean, as you know, black holes are technically unseeable.

They trap everything that falls inside, including light. Anything that passes through the event

horizon, which is the boundary, is trapped there forever. It can just never escape. But

supermassive black holes like Sagittarius A-star are surrounded by glowing obliterated matter.

It's orbiting the black hole. Some of it's falling in. Some of it just forms this disc around it.

And that stuff glows. And the black hole, because of the way it warps space-time around it,

because of the incredible force of gravity, it casts a shadow against that glowing matter.

And so that's actually what we see in this picture.

So we know that astronomers captured this image with a worldwide network of radio observatories

called the Event Horizon Telescope, or the EHT.

That's what you wrote a book about.

Can you tell me a little bit about this?

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