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Astronomers observe rings forming around icy celestial body Chiron
Publicado em 15 de outubro de 2025
By Will Dunham WASHINGTON (Reuters) -The rings of Saturn are among the wonders of our solar system, with a diameter of roughly 175,000 miles (280,000 kilometers) as they encircle the giant planet.
But smaller celestial bodies in the solar system also boast ring systems that are impressive in their own right, even if their scale is not as grand.
Scientists said they have observed for the first time a ring system in the process of formation and evolution, consisting of four rings and [...]
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An average of 15% of Brazilians have COVID-19 antibodies, study finds
Publicado em 26 maio 2021BRASILIA (Reuters) – An average of 15% of Brazil’s 210 million people have COVID-19 antibodies, researchers announced on Wednesday. The study, backed by the Sao Paulo state government’s research foundation (FAPESP) and Federal University of Sao Paulo (Unifesp), was conducted up to the end of April when contagion was on the rise. Researchers found that the level of antibodies varied greatly across the country. For example, in the northeastern state of Ceara, 9.89% of people [...]ver notícia