Found a giant moon the size of Neptune


Photo: Roman Krompolc / CTK

Astronomers from Columbia University (USA) for the first time proved the existence of a satellite which orbits around the gas giant, located at a distance of eight thousand light-years from Earth. About it reported in a press release on

According to scientists, the discovery of the moon became possible due to the fact that its size is comparable with that of the gas giants of the Solar system as Neptune. The researchers analyzed data obtained from the study of 284 exoplanets discovered by the Kepler space telescope and orbiting host stars with a period longer than 30 days. In the course of the observation were used the transit method, which involves measuring the Shine lights while passing on her planet.

Astronomers have identified an anomaly in the system Kepler 1625, resulting in small deviations in the light curve. Follow-up for 19-hour transit of the exoplanet using the Hubble Space Telescope, which allowed to detect a downturn in star Shine through 3.5 hours after the gas giant has left the disk. This pointed to the existence of a large satellite. It is estimated that the mass of the moon is 1.5 percent of the mass of the exoplanet, which is several times heavier than Jupiter.

Video, photo All from Russia.


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