I think I see the aorta.
"You're looking at the heart of your own galaxy with X-ray specs. This photograph was captured by NASA's Chandra X-Ray observatory, and shows the three massive star clusters that surround the supermassive black hole at the centre of the Milky Way. These star clusters have so many large, bright stars that the whole area blazes in the X-ray spectrum. This photo shows 1 million seconds of accumulated observing time by Chandra of these mysterious region of our galaxy. "