A hot pink letter "H" is carved into the blazing hot gas that surrounds a supermassive black hole that lurks at the heart of a massive galaxy. The structure is a staggering 40,000 light-years tall, making it about half the width of our entire galaxy, the Milky Way.
The "H" was revealed in an X-ray image of gas that surrounds the black hole in the elliptical galaxy Messier 84 (M84), located around 60 million light-years from Earth in the constellation Virgo.
