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current | 17:28, 30 March 2019 | 2,284 × 918 (94 KB) | Incnis Mrsi | =={{int:filedesc}}== {{Information |description={{en|1=PIA19345: How to Make a Helium Atmosphere – fossil state http://photojournal.jpl.nasa.gov/catalog/PIA19345 NASA's Spitzer Space Telescope observed a proposed helium planet, GJ 436b. This diagram illustrates how hypothetical helium atmospheres might form. These would be on planets about the mass of Neptune, or smaller, which orbit tightly to their stars, whipping around in just days. They are thought to have cores of water or rock, surro... |
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