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General utility services

The researches made by astronomers are not only the exploration of the sky: they are also made in order to understand celestial motions and phenomena. From them, observations of the sky will be used for the structuration of our life (legal time, calendars, ephemerides) and also to protect (solar eruptions, cosmic rays).

Calendars

Ephemerides

The French legal time

Observing the Sun

Monitoring the cosmic rays