True Shape of the Boomerang

(ESO PoTW) – This picture shows the Boomerang Nebula, a protoplanetary nebula,  as seen by the Atacama Large Millimeter/submillimeter Array (ALMA). The background purple structure, as seen in visible light with the NASA/ESA Hubble Space Telescope, shows a classic double-lobe shape with a very narrow central region. ALMA’s ability to see the cold molecular gas reveals the nebula’s more elongated shape, in orange. …

eso potw1724

ESO PoTW 1724a: Boomerang Nebula, by ALMA

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