Astronomers have discovered a huge, wave-shaped chain of gas clouds in the Milky Way. Structure stretches over a length of 9,000 light years and is 500 light years away from Earth.
Researchers tracked the movement of the baby stars that are born in the gas clouds along the Radcliffe wave. Structure continues to pose a mystery - it remains unknown how it came about and why it moves like a La Ola wave. The researchers have initial theories about this, which they now want to test.