Agora que a XV OBA já passou vamos deixar essa page para tirar dúvidas diversas suas sobre o campo da Astronomia, Astrofísica, Cosmologia, Astronáutica e até Mitologia... Então pode perguntar a vontade, buscaremos responder todas as questões.
Gabaritos OBA 2012:
Downloads dos materias de aula:
- Aula 01 - Sistema Solar, Terra e Lua (solstícios e equinócios, formação da Terra e da Lua, influência da Lua na Terra, etc.)
- Aula 02 - Mitologia e Astronáutica básica
- Ciclo de Vida de uma Estrela
- Aula 03 - Leis de Kepler
- Provas e gabaritos OBA (2007-2011)
Porque o céu é azul?
ResponderExcluirO azul celeste deve-se a presenta do gás ozônio (O3) na atmosfera terrestre, que em contato com a luz solar refrata a coloração azul do gás.
ExcluirAs medidas de distancia das galáxias feitas pelo redshift seria confiável? O espectro de luz de uma estrela distante sofre o efeito do redshift? Se sofre, este spectro não será verdadeiro e não podemos confirmar os elementos quimicos. Se não sofre, como podemos confiar nas distancias das estrelas e galáxias?.
ResponderExcluirPorque, ao olhar as fotos tiradas pelo Hublle no ultra deep field, vemos galáxias de várias cores, quando deveriamos ver tudo em vermelho, infravermelho ou mesmo não deveriamos ver nada, pois a luz nesta distancia deveria ser de uma frequencia bem abaixo do infravermelho.
Districts can only exceed the limit, known as the Act 1 Index, by either getting voter approval in the spring primary via a referendum, or by getting exceptions allowed by the state for a limited number of reasons. You should follow the link to the terms of use on the appropriate page for such sites to determine which company terms of use governs such sites.
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