For decades, astronomers have attempted to piece together the mystery of how galaxies, stars and planets formed from an empty universe. They recently stumbled upon a gargantuan system that formed just 1.5 billion years after the Big Bang — and it challenges some of the accepted theories of how all galaxies in the universe may have formed.

According to a study published Wednesday in the journal Nature, the 12.5 billion-year-old rotating galactic disk formed much earlier than astronomers thought possible for a galaxy of its size. They renamed galaxy DLA0817g the “Wolfe Disk,” after late astronomer Arthur M. Wolfe.

Disk galaxies, as the name suggests, are disk-shaped systems of stars, including spiral systems like our Milky Way. Previous observations showed these types of galaxies formed gradually, and

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