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Timeline of World War 1 (in movies)


Tout savoir sur le corona virus [covid-19]

#COVID819 #stay_home #stay_safe

questions fréquentes sur la maladie à coronavirus 2019 (COVID-19)

source : organisation mondiale de la santé (OMS)

Enigmas of the Solar System | Documentary Boxset | Knowing the Planets

The Solar System is the gravitationally bound system of the Sun and the objects that orbit it, either directly or indirectly. Of the objects that orbit the Sun directly, the largest are the eight planets, with the remainder being smaller objects, the dwarf planets and small Solar System bodies. Of the objects that orbit the Sun indirectly—the moons—two are larger than the smallest planet, Mercury.
The Solar System formed 4.6 billion years ago from the gravitational collapse of a giant interstellar molecular.......



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