https://repositorio.ufba.br/handle/ri/6800 Sat, 16 May 2026 22:35:34 GMT 2026-05-16T22:35:34Z https://repositorio.ufba.br/handle/ri/33700 Non-boltzmannian distributions observed in small bodies of the solar system Borges, Ernesto Pinheiro; Betzler, Alberto Silva Previous works have shown that some features of small bodies of the Solar System (mass, diameters, rotation periods, and apparent magnitudes) are relatively well modeled by distributions originally derived from Tsallis statistical mechanics. Some of the observed distributions are fitted in almost the entire range of the variables, different from other distributions. We revisit these previous studies and update them with recent data. Our results corroborate the previous ones, – that distributions based on the q-exponential family are usually found in statistical description of these planetary systems –, and reinforce the conjecture that the underlying mechanism that generates these observed data may have a nonextensive nature. L’Accademia Nazionale delle Scienze Artigo de Periódico Wed, 01 Apr 2020 00:00:00 GMT https://repositorio.ufba.br/handle/ri/33700 2020-04-01T00:00:00Z https://repositorio.ufba.br/handle/ri/33622 O trabalho científico de Sir William Herschel Betzler, Alberto Silva Em 1781, Sir William Herschel foi o primeiro, em toda a história da Astronomia, a registrar a descoberta de um planeta. O planeta Urano, interpretado pelo próprio como um cometa, projetou-o ao patamar de uma celebridade conhecida em toda a Europa. Mais do que o descobridor de um planeta, Herschel foi um brilhante astrônomo e construtor de telescópios, tendo realizado observações sistemáticas que iniciaram novos campos de pesquisa astronômica. Tais pesquisas geraram importantes contribuições para entendimento do Sistema Solar e da galáxia que habitamos. Possuindo uma boa base em matemática e física percebe-se, nas pesquisas de Herschel, o uso constante do método científico e da física newtoniana. Revista Macrocosmo.com Artigo de Periódico Mon, 01 Jan 2007 00:00:00 GMT https://repositorio.ufba.br/handle/ri/33622 2007-01-01T00:00:00Z https://repositorio.ufba.br/handle/ri/33245 Os dragões dominam o espaço: passado, presente e o ambicioso futuro do programa espacial chinês Betzler, Alberto Labjor/Nudecri – Unicamp Artigo de Periódico Mon, 01 Jan 2001 00:00:00 GMT https://repositorio.ufba.br/handle/ri/33245 2001-01-01T00:00:00Z https://repositorio.ufba.br/handle/ri/31932 A bright fireball over the state of Rio Grande do Sul Zurita, Marcelo; Marreira, Rubens Damiglê Alves; Agustoni, José Serrano; Di Pietro, Carlos Bella; Domingues, Marcelo; Trindade, Lauriston; Souza, Jocimar Justino de; Lima, Andrei Roger; Silva, Gabriel Gonçalves; Mourão, Daniela Cardozo; Betzler, Alberto Silva On June, 7th, 2019, around 01h33m (UT), inhabitantsfrom Brazil (mainly in the Southern Region states), Argentina, Paraguay and Uruguay observed a very bright fireball which was also recorded by two meteor monitoring stations of BRAMON. The fireball entered in the atmosphere with a velocity of 14.3 km/s at an altitude of 104 km over the south of Paraguay, travelling 393 km until reaching its dark flight at an altitude of 27.4 km over the state of Rio Grande do Sul. The calculated energy corresponds to an entry mass between 3.25 × 103 kg and 5.75 × 103 kg (this corresponds to a meteoroid with a diameter of 1.2 m to 1.4 m). It is believed that about 10% of the original mass reached the ground. The shallow trajectory created a large meteorite strewn field that could extend from the cities of Jari to Santa Maria (Rio Grande do Sul, Brazil). Teams conducted a meteorite search in the area, with no success so far. eMeteorNews Artigo de Periódico Thu, 21 May 2020 00:00:00 GMT https://repositorio.ufba.br/handle/ri/31932 2020-05-21T00:00:00Z