The brightest such objects, known as quasars, are among the brightest astronomical objects in the whole ... quasar mass ...

When a supermassive black hole lights up like this, we call it a quasar. To get a good look at ... but not with the whole ...

more than you get from whole galaxies with millions of stars, and then you have a quasar." Dr Mariya Lyubenova is an astronomer at the European Southern Observatory in Germany. She says black ...