Physicists have long assumed that the universe is pretty much the same in any direction, and now they've found a new way to test that hypothesis: by examining the shadow of a black hole.
If that shadow is a wee bit smaller than existing physics theories predict, it could help prove a far-out notion called bumblebee gravity, which describes what would happen if the seemingly perfect symmetry of the universe isn't so perfect after all. /.../
If scientists can find a black hole with such an undersized shadow, it would open the door to a brand-new understanding of gravity — and perhaps explain why the universe is expanding ever faster.
But to understand how this bumblebee idea could fly, let's dig into some fundamental physics.
# "LIVE" de Bugios no Sítio Primavera, em Viamão
Gravação de autoria de nosso neto Antônio A. Olivé em nosso sítio
MP4 com som (É possível que seja necessário baixar o arquivo para rocar)
#Fotoetnografia: 25 anos
[16/1 01:10] Luiz Eduardo Robinson Achutti: A RBSE Revista Brasileira de Sociologia da Emoção abre chamada pública de artigos e ensaios para o dossiê: “25 anos de fotoetnografia: balanço, desafios e perspectivas”.
Este dossiê, coordenado pelos Professores Doutores Fábio Lopes Alves (PPGE/PPGSCF/Unioeste) E-mail:
fabiobidu@hotmail.com; Claudia Barcelos de Moura Abreu (PPGE/Unifesp) E-mail:
claudia.abreu@unifesp.br; e Tânia Maria Rechia Schroeder (PPGE/Unioeste) E-mail:
tania.rechia@hotmail.com, deverá compor o volume 20, número 60, de dezembro de 2021 da RBSE.
| The definitive story of Wikipedia on its 20th anniversary |
|
No comments:
Post a Comment