1st image of our galaxy's 'black hole heart' unveiled

Astronomers have captured the first ever image of the colossal black hole at the center of our galaxy, providing the first direct evidence of the cosmic giant's existence.

Located 26,000 light-years away, Sagittarius A* is a gargantuan tear in space-time that is four million times the mass of our sun and 40 million miles (60 million kilometers) across. 

The image was captured by the Event Horizon Telescope (EHT), a network of eight synchronized radio telescopes placed in various locations around the world. 

As not even light is able to escape the powerful gravitational pull of a black hole, it's impossible to see Sagittarius A* itself except as the silhouette of a ring of fuzzy, warped light. 

Once the slowly stripped and shredded plasma plunges over the black hole's precipice, or event horizon, it is lost inside forever. 

"Our results are the strongest evidence to date that a black hole resides at the centre of our galaxy," Ziri Younsi, an astrophysicist at University College London and an EHT collaborator, said in a statement. 

"This black hole is the glue that holds the galaxy together. It is key to our understanding of how the Milky Way formed and will evolve in the future."