5 liens privรฉs
" ... after dinner, the weather being warm, we went into the garden, & drank thea under the shade of some apple trees, only he, & myself. amidst other discourse, he told me, he was just in the same situation, as when formerly, the notion of gravitation came into his mind. "why should that apple always descend perpendicularly to the ground," thought he to him self: occasion'd by the fall of an apple, as he sat in a comtemplative mood: "why should it not go sideways, or upwards? but constantly to the earths centre? assuredly, the reason is, that the earth draws it. there must be a drawing power in matter. & the sum of the drawing power in the matter of the earth must be in the earths center, not in any side of the earth. therefore dos this apple fall perpendicularly, or toward the center. if matter thus draws matter; it must be in proportion of its quantity. therefore the apple draws the earth, as well as the earth draws the apple."
La grosse nouvelle scientifique de la semaine, du mois ou mรชme de l'annรฉe a รฉtรฉ annoncรฉe par des titres comme "Big Bang : les ondes gravitationnelles d'Einstein enfin dรฉtectรฉes" ou "Des physiciens dรฉcouvrent des preuves du Big Bang". La dรฉcouverte est fantastique, mais ces titres sont trompeurs:
What if the universe had no beginning, and time stretched back infinitely without a big bang to start things off? That's one possible consequence of an idea called "rainbow gravity," so-named because it posits that gravity's effects on spacetime are felt differently by different wavelengths of light, aka different colors in the rainbow.
Space babies get major vertigo on Earth after a microgravity childhood.