Scientists discover largest gas cloud in space that's 20 times bigger than the Milky Way

Glowing in the Pegasus constellation are five apparently closely packed galaxies known as Stephan's Quintet — and they are whispering the secrets of galactic evolution to scientists.

Scientists discover largest gas cloud in space that's 20 times bigger than the Milky Way
Glowing in the Pegasus constellation are five apparently closely packed galaxies known as Stephan's Quintet — and they are whispering the secrets of galactic evolution to scientists.