Maxime Trebitsch

A galaxy is like a house with drawn curtains: bright ultraviolet light is born inside, but from outside you only see what manages to sneak through dust and gas. Astronomers need to know how much of this light escapes into intergalactic space, because it ionizes hydrogen in the early Universe and makes it transparent.

A fountain shoots from the center of the city at a speed thousands of times faster than a courier bike. Such a 'fountain'—a stream of gas accelerated to 5500 kilometers per second — has been spotted by astronomers in the galaxy GLIMPSED-329380.