Astronomers say they have discovered what may be a huge moon orbiting a planet in a distant solar system.
Some of the same researchers who found the first purported exomoon now say that they’ve found another., the satellite has a radius about 2.6 times that of Earth, and circles a Jupiter-sized exoplanet that orbits its parent star about once every two Earth years, the team reports January 13 inTo find this nugget, the team sorted through a database of more than 4,000 exoplanets detected by NASA’s now-retired Kepler space telescope.
Each of these planets is between half and twice the size of Jupiter. They all either take more than 400 Earth days to orbit their star or have an estimated average surface temperature less than 300 kelvins , slightly higher than that of Earth. After further screening, including tossing out exoplanets that don’t have near-circular orbits , the team identified a strong candidate for an exomoon. It, like its host planet, caused detectable dimming of the parent star’s light when moving across the face of the star.
France Dernières Nouvelles, France Actualités
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