La galaxie d’Andromède est à 2,5 millions d’années-lumière. Vu depuis la Terre, le voyage durerait des millions d’années. Mais à 99,9 % de la vitesse de la lumière… toi, tu ne vieillirais que de 30 ans. Le temps n’est pas le même pour tout le monde. C’est la dilatation du temps. 👉 Abonne-toi si l’univers te fascine.#espace #univers #astronomie #cosmos #terre
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La galaxie d’Andromède est à 2,5 millions d’années-lumière. Vu dep…
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156K views · 2.9K reactions |  Le fait le plus surprenant sur l’univers #astronomie #espace #trounoir #cosmos #science #astro #galaxie #astrobaguette | Astro Baguette | Facebook
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