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Astronomers Have Detected an Exomoon for the First Time

A discovery in a solar system 73 light-years from Earth is challenging definitions and “blurring the lines between stars, planets, and moons.”
An international research team has discovered evidence of a moonlike body. It marks the first time such an object has been detected outside our solar system—though just how close it comes to being a moon is a question researchers are still grappling with. Although more than 6,000 exoplanets have been discovered to date, there’s been a lack of definitive evidence of moons in other planetary systems. The new findings challenge that by focusing on an object orbiting the brown dwarf CD-35 2722 B in a system 73 light-years away. A…
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