Photographing our Galaxy’s Black Hole | CfA

source: Harvard University     2017年1月25日
A black hole is so dense that not even light can escape it. So we can’t possibly photograph one, can we? Yes, we can. More accurately, we can observe its silhouette or shadow against the glowing disk of material it’s swallowing. The Event Horizon Telescope will unite facilities around the globe to form an Earth-sized telescope. With it, we will get our first detailed look at the giant black hole at the center of the Milky Way. And we will put Einstein’s theory to the ultimate test. Speaker Michael Johnson is an astrophysicist at the Harvard-Smithsonian Center for Astrophysics (CfA).