This Is Where Space Blobs Come From

A combination of observation and modelling sheds new light on how Lyman-Alpha blobs form and why they shine so brightly.

Lyman-Alpha blobs are among the rarest denizens of the distant universe. They’re giant clouds of hydrogen gas spanning hundreds of thousands of light years, named for the trademark radiation they emit. Now combined observations from several telescopes have given astrophysicists a look at what’s going on inside and what produces the characteristic radiation.

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