In 2018, a galaxy about 270 million light-years away from Earth exhibited a major increase in activity. It quieted down again by 2020 -- only to dramatically increase its output again in 2023. At that ...
NASA has successfully transmitted a laser signal from Earth to a spacecraft located 466 million kilometers away, marking a ...
International research team unveils the first electrically pumped continuous-wave semiconductor laser designed for seamless ...
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