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Google Doodle Celebrating Today, First Image of a Black Hole

Google Doodle Celebrating Today, First Image of a Black Hole

First Image of a Black Hole


Google Doodle Celebrating Today, First Image of a Black Hole

Albert Einstein's towering genius is on display yet again.

The first-ever images of a black hole, which the Event Horizon Telescope (EHT) project unveiled today (April 10), further bolster Einstein's century-old theory of general relativity, researchers said.

"Today, general relativity has passed another crucial test, this one spanning from horizons to the stars," EHT team member Avery Broderick, of the University of Waterloo and the Perimeter Institute for Theoretical Physics in Canada, said during a news conference today at the National Press Club in Washington, D.C.

General relativity makes specific predictions about how this warping works. For example, the theory posits that black holes exist, and that each of these gravitational monsters has an event horizon — a point of no return beyond which nothing, not even light, can escape. Further, the event horizon should be roughly circular and of a predictable size, which depends on the black hole's mass.

And that's just what we see in the newly unveiled EHT images, which show the silhouette of the supermassive black hole at the heart of M87, a giant elliptical galaxy that lies 55 million light-years from Earth.

"The shadow exists, is nearly circular and the inferred mass matches estimates due to the dynamics of stars 100,000 times farther away," Broderick said.

That mass, by the way, is 6.5 billion times that of Earth's sun. That's huge even by supermassive-black-hole standards; for comparison, the behemoth at the heart of our Milky Way galaxy weighs in at a mere 4.3 million solar masses.

As Broderick noted, this is not the first test that general relativity has passed; the theory has survived many challenges over the past 100 years.

For example, general relativity predicts that massive, accelerating objects generate ripples in space-time called gravitational waves. In 2015, gravitational waves were confirmed directly by the Laser Interferometer Gravitational Wave Observatory (LIGO), which detected the ripples created by a merger between two black holes. (These black holes weren't the supermassive type; combined, they contained just a few dozen solar masses.)

So, it's not exactly a surprise that Einstein was right about event horizons as well. But confirming that general relativity holds in a hitherto unstudied realm has great value, EHT team members said.

EHT's work "has verified Einstein's theories of gravity in this most extreme laboratory," EHT director Sheperd Doeleman, of Harvard University and the Harvard-Smithsonian Center for Astrophysics, said during today's press conference.

First Image of a Black Hole, Google Doodle Celebrating Today

First Image of a Black Hole, Google Doodle Celebrating Today

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Life Story: Blogging Tip's, Latest, Trailer, Movies, Review, Breaking: Google Doodle Celebrating Today, First Image of a Black Hole
Google Doodle Celebrating Today, First Image of a Black Hole
Google Doodle Celebrating Today, First Image of a Black Hole
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