Discover and read the best of Twitter Threads about #DarkMatterDay

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El 31 de octubre se celebra el día internacional de la materia oscura #DarkMatterDay! (ya que por #Halloween salen los fantasmas 👻🎃) .
¿Sabéis que los romanos nos han ayudado a buscarla experimentalmente? Vamos por partes en un nuevo #hiloIFT...
La #MateriaOscura constituye el 83% de toda la materia en el Universo, pero aún hemos sido incapaces de averiguar de qué está hecha. Y es que detectar estas nuevas partículas no es nada fácil. ¡Atraviesan cualquier material sin apenas dejar traza!

Para intentar observar la materia oscura, los detectores han de ser extremadamente sensibles y protegerse de cualquier otro tipo de señal. Para empezar, se sitúan bajo tierra, como por ejemplo en el Laboratorio Subterráneo de Canfranc @labsubcanfranc
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#DYK American astronomer #VeraRubin was met by skeptics in the 1970s when she proposed evidence for dark matter. She studied galactic rotation curves.

According to Newton's laws, when objects rotate around a common centre, the ones furthest from the centre move more slowly than those near it. Otherwise, the furthest objects would fly off into space.

Rubin's observations of stars in galaxies didn't match this. Either there is mass that we can't see or gravity behaves differently than we presently know. #DarkMatter is now widely accepted in the scientific community thanks to the work of Vera Rubin.

Read 3 tweets

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