I was reading an article in the newspaper today that referred to LIGO (and gravity-wave measurements in general) as "a new type of telescope".
That got me thinking -- as I understand it, LIGO uses lasers to measure the changes in the distances along two pathways, with the output data being in the form of two scalar values.
Is it possible, either in practice (someday?) or even just in principle to use gravity waves to produce viewable 2D images of astronomical objects, the way we currently do with e.g. infrared telescopes?