Not long ago I came across a piece in the Scientific American archives from the earliest days of very-long baseline radio interferometry, the technique employed by the Event Horizon Telescope...
Wired has a fun piece about physicist and black-hole guru Kip Thorne's work on the film Interstellar, which comes out November 7. We've known the premise of the film for a long time: Earth is a disaster, the human race is on the verge of extinction, and mankind must find a new home...
Before they can see Sagittarius A*, the black hole at the center of the Milky Way, the astronomers of the Event Horizon Telescope (EHT) must complete an epic to-do list.
A few months ago I went to Cambridge, Mass. to check in with the Event Horizon Telescope crew and found Shep Doeleman, the project leader, fresh off the completion of a major purchase.
For the past year, astronomers around the world have been watching the center of the Milky Way in anticipation of a once-per-eon event. Right around now (or, technically, 24,000 years ago--that's roughly how far away the galactic center is in light years), a cloud of gas and dust plummeting toward our galaxy's supermassive black hole, [...]..
Looking into the galactic center is hard. So much dust and gas lies between us and the center of the Milky Way that very little of the visible light emitted there makes it to us.
The image you see here is a computer-generated model of the black hole at the center of the Milky Way, which we call Sagittarius A*. More precisely, it is a model of the "shadow" that Sagittarius A*, with its mass of four million suns, should cast...
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