Discovery of the First Molecular Ion in the Universe
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After 30 years of searching, the helium hydride ion, the first chemical bond that was formed in the Universe, has finally been detected outside the laboratory, in the interstellar medium. It was seen in planetary nebula NGC 7027 using the GREAT spectrometer aboard the Stratospheric Observatory for Infrared Astronomy.
Astrophysics and Astronomy
Discovery of the First Molecular Ion in the Universe.
Nature Astronomy, 3