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Fast-Spinning Brown Dwarfs May Reveal a Rotational Speed Limit – Exoplanet Exploration: Planets Beyond our Solar System


With so much variety among the brown dwarf speeds already measured, it surprised the authors of the new study that the three fastest brown dwarfs ever found have almost the exact same spin rate (about one full rotation per hour) as each other. This cannot be attributed to the brown dwarfs having formed together or being at the same stage in their development, as they are physically different: One is a warm brown dwarf, one is cold, and the other falls between them. Since brown dwarfs cool as they age, the temperature differences suggest these brown dwarfs are different ages. ....

United States , City Of , United Kingdom , Western University , Stanimir Metchev , Megan Tannock , Propulsion Laboratory , Science Mission Directorate , Spitzer Science Center , Canada Research , Program Of The National Science Foundation Noirlab , Institute For Earth , Micron All Sky , Space Telescope , Astronomical Journal , Two Micron All Sky Survey , Gemini North , Dwarf Graphic , Canada Research Chair , Extrasolar Planets , Space Exploration , Mission Directorate , Lockheed Martin Space , Infrared Science Archive , Gemini Observatory , National Science Foundation ,

Comet makes a pit stop near Jupiter's asteroids


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IMAGE: Astronomers found a roaming comet taking a rest stop before possibly continuing its journey. The wayward object made a temporary stop near giant Jupiter. The icy visitor has plenty of.
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Credit: Credits: NASA, ESA, and B. Bolin (Caltech)
After traveling several billion miles toward the Sun, a wayward young comet-like object orbiting among the giant planets has found a temporary parking place along the way. The object has settled near a family of captured ancient asteroids, called Trojans, that are orbiting the Sun alongside Jupiter. This is the first time a comet-like object has been spotted near the Trojan population. ....

Johns Hopkins University , United States , Mauna Kea , Goddard Space Flight Center , New Mexico , Apache Point Observatory , Seiichi Yoshida , Bryce Bolin , Ray Villard , Claire Andreoli , Carey Lisse , B Bolin Caltech , Propulsion Laboratory , Science Mission Directorate , Johns Hopkins University Applied Physics Laboratory , University Of Hawaii Asteroid Last Alert System , Research In Astronomy , Space Telescope Science Institute Stsc , Space Telescope Science Institute , Spitzer Science Center , European Space Agency , Association Of Universities , Space Telescope , Asteroid Terrestrial Impact Last Alert System , Zwicky Transient Facility , Palomar Observatory ,