Astronomers Detect Powerful “Galactic Space Laser” Five Billion Light Years From Earth

[ad_1] Inside a galaxy merger are hydroxyl molecules, composed of one atom of hydrogen and one atom of oxygen. When one molecule absorbs a photon at an 18cm wavelength, it emits two photons of the same wavelength. When molecular gas is very dense, typically when two galaxies merge, this emission gets very bright and can […]

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