Sagitarius A*

Very excited today because of the work commencing on the observation of the

black hole deemed to inhabit the center of our galaxy. A group of radio telescopes from

various points on the planet will work in tandem -  forming a virtual telescope called the Event Horizon Telescope - between April 5 and 14.

Because it is a black hole, one is looking for its shadow - an ugly peanut -

which affects the activity outside the event horizon.

One side of the image would be brighter than the other because relativistic effects boost the apparent brightness of material moving toward us. (The Atlantic).

They will looking for activity at a wavelength of 1.3 millimeter.

source: Wikipedia

https://www.theatlantic.com/science/archive/2017/03/alma-black-hole-shadow/520608/