Mad maps


Behold: the Milky Way galaxy in all its hydrogen glory.


Benjamin Winkel and the HI4PI collaboration

Neutral atomic hydrogen – the most abundant element in space and the main component of stars and galaxies – has been mapped across the whole sky in a survey known as HI4PI.

The project used more than a million individual observations and about ten billion individual data points. The work was published in Astronomy and Astrophysics.

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