Hanny’s Voorwerp (say that ten times fast!) is a giant cloud of gas near the spiral galaxy IC 2497, which lies about 650 million light-years from Earth. Basically, it’s that giant green blob in the picture above. And that giant green blog is the epicenter for the formation of new stars. Well, epicenter is the wrong word.
But, if I slightly understand this NatGeo article, there is a region in Hanny’s Voorwerp that “is collapsing and forming stars, the youngest of which are just a couple million years old.” Fairly young, if we’re counting in star years. So basically, in layman terms, you’re staring at the squishy green placenta of the universe’s womb.