How large are some of the largest known gaseous structures relative to the Milky Way?

Answer

Estimated to be larger than the entire diameter of the Milky Way galaxy.

The scale of cosmic clouds challenges terrestrial comprehension due to their immense size on a galactic level. While many clouds are vast, spanning hundreds of light-years, the most massive gaseous structures known push the boundaries of even galactic dimensions. Some of these extremely large complexes are estimated in size to surpass the entire diameter of our home galaxy, the Milky Way. This demonstrates that these structures are not isolated features but massive reservoirs of raw material existing across enormous scales within the galactic environment.

How large are some of the largest known gaseous structures relative to the Milky Way?

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