Nov 25, 2021

Hubble witnesses shock wave of colliding gases in Running Man Nebula

Posted by in category: futurism

Mounded, luminous clouds of gas and dust glow in this Hubble image of a Herbig-Haro object known as HH 45.

Herbig-Haro objects are a rarely seen type of nebula that occurs when hot gas ejected by a collides with the gas and dust around it at hundreds of miles per second, creating bright shock waves. In this image, blue indicates ionized oxygen (O II) and purple shows ionized magnesium (Mg II). Researchers were particularly interested in these elements because they can be used to identify shocks and ionization fronts.

This is located in the nebula NGC 1977, which itself is part of a complex of three nebulae called The Running Man. NGC 1977—like its companions NGC 1975 and NGC 1973—is a reflection nebula, which means that it doesn’t emit light on its own, but reflects light from , like a streetlight illuminating fog.

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