The region of space around Sagittarius A*, the supermassive black hole at the centre of our galaxy NASA/CXC/Univ. of Wisconsin/Y.Ba
The colossal black hole at the centre of the Milky Way hasn鈥檛 always been so quiet.
Our galaxy鈥檚 supermassive black hole, called Sagittarius A* (Sgr A*), is relatively inactive now, but observations of the gas clouds around it hint that it may have released a powerful blast of X-rays about 205 years ago.
When a black hole puts out an聽X-ray flare, that radiation can bounce off any gas in the area before spreading outwards to the…
