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A brown dwarf is an astronomical object that is an intermediate between a planet and a star. Brown dwarfs usually have a mass less than 0.075 that of the Sun or
A brown dwarf is an astronomical object that is an intermediate between a planet and a star. Brown dwarfs usually have a mass less than 0.075 that of the Sun or
A brown dwarf is an astronomical object that is an intermediate between a planet and a star. Brown dwarfs usually have a mass less than 0.075 that of the Sun or
A brown dwarf is an astronomical object that is an intermediate between a planet and a star. Brown dwarfs usually have a mass less than 0.075 that of the Sun or
Over the past year, researchers mourned the loss of Arecibo and applauded the first helicopter flight on Mars. Plus, commercial spaceflight really took off.