Japanese astronomers discovered the King Ghidorah supercluster in late 2022 using data from the Subaru Telescope. Located 6.7 billion light-years from Earth, the supercluster ranks as the largest ever discovered, stretching 1.3 billion light-years across the sky. It covers an area equivalent to 19 full moons as viewed from Earth.
The King Ghidorah supercluster comprises at least 19 individual galaxy clusters and holds a mass equal to 10 quadrillion suns, roughly 10 times more massive than Laniakea, the supercluster containing the Milky Way. The entire Milky Way could fit across the King Ghidorah supercluster approximately 12,300 times.
Astronomers named the supercluster after the three-headed golden dragon from the Godzilla films. King Ghidorah first appeared in the 1964 movie Ghidorah, the Three-Headed Monster, and has returned as a character in numerous Godzilla films since, including the recent Godzilla Minus Zero.