The planets revolve around their star because of the gravitational force that holds them close to the star, in very stable orbits, but not immutable
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L’astronomie date de plusieurs milliers d’années, l’astronomie est probablement une des plus anciennes des sciences naturelles, ses orig
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Does no one know the future? In any case, it is gravity that determines it. Our Milky Way galaxy is scheduled to hit our nearest large neighbour, the
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