File:PIA21428-TRAPPIST-1-Comparison-SolarSystem&JovianMoons-20180205.jpg
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[編輯]描述PIA21428-TRAPPIST-1-Comparison-SolarSystem&JovianMoons-20180205.jpg |
English: PIA22096: TRAPPIST-1 Compared to Jovian Moons and Inner Solar System - Updated Feb. 2018
https://photojournal.jpl.nasa.gov/catalog/PIA22096 All seven planets discovered around the red dwarf star TRAPPIST-1, in their orbits, would easily fit inside the orbit of Mercury, the innermost planet of our solar system. In fact, they would have room to spare. TRAPPIST-1 also is only a fraction of the size of our Sun; it isn't much larger than Jupiter. So, the TRAPPIST-1 system's proportions look more like Jupiter and its moons than those of our solar system. The seven planets of TRAPPIST-1 are all Earth-sized and terrestrial. TRAPPIST-1 is an ultra-cool dwarf star in the constellation Aquarius, and its planets orbit very close to it. This image is an update to PIA21428, based on more precise measurements of the planets' densities, as of February 2018. NASA's Jet Propulsion Laboratory, Pasadena, California, manages the Spitzer Space Telescope mission for NASA's Science Mission Directorate, Washington. Science operations are conducted at the Spitzer Science Center at Caltech, also in Pasadena. Spacecraft operations are based at Lockheed Martin Space Systems Company, Littleton, Colorado. Data are archived at the Infrared Science Archive housed at Caltech/IPAC. Caltech manages JPL for NASA. For additional information about the Spitzer mission, visit http://www.nasa.gov/spitzer and http://spitzer.caltech.edu. For additional information on the Kepler and the K2 mission, visit www.nasa.gov/Kepler. For additional information about exoplanets, visit https://exoplanets.nasa.gov/. |
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來源 | https://photojournal.jpl.nasa.gov/jpeg/PIA22096.jpg |
作者 | NASA/JPL-Caltech |
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本作品由NASA創作,屬於公有領域。根據NASA的版權政策:“NASA的創作除非另有聲明否則不受版權保護。”(參見:Template:PD-USGov/zh,NASA版權政策或JPL圖像使用政策) | ||
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