On 19 December, the party Gaia satellite, , so called because it stands for Global Astrometric Interferometer for Astrophysics.
The satellite
inside the largest telescope in Europe to catalog a billion stars and make very precise astrometric measurements.
In 10 days around his journey will end and the satellite will begin to map our dear Milky Way , sending data to Earth: in this way we will have a detailed map of the portion of the galaxy nearest us and a less precise than more distant.
ESA is considered really satisfied with this mission and it will be even more so when Gaia will start to send the first data, thus creating a three-dimensional map of the galaxy .
In addition, thanks to the potential of the satellite, you will be able to locate and identify many extrasolar planets: by 2018 will be identified about 8000 exoplanets and about 1000 solar systems. smallest detectable planet will have a mass of 300 times that of Earth.
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