Astronomers May Have Discovered First Moon Outside Our Solar System

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来源: space.com | 主题: Space | 评论: 37

时间: on Friday July 24, 2026 @11:00AM

Astronomers studying the star system CD-35 2722 may have found the first known moon-like object outside our solar system . The classification is unusually tricky, however, because it orbits a brown dwarf rather than a planet, making it clearly an "exosatellite" but forcing scientists to rethink where the line between planet, moon, and failed star should be drawn. Space.com reports: The star CD-35 2722 is located around 73 light-years away and has around half the mass of the sun. It is orbited by a "failed star" or brown dwarf. These stellar bodies get their unfortunate nickname because they form like other stars but fail to gather enough mass to trigger the fusion of hydrogen to helium in their cores. In terms of mass, brown dwarfs are more massive than the largest gas giant planets, but s

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