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
Read MoreL’astronomie date de plusieurs milliers d’années, l’astronomie est probablement une des plus anciennes des sciences naturelles, ses orig
Read MoreDoes 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
Read More