Um meteoro geminado do arco-íris

Meteoro pode se colorido. Embora o olho humano geralmente não consiga discernir muitas cores, as câmeras geralmente conseguem. Na foto, um Geminídeo capturado pela câmera durante a chuva de meteoros da semana passada, que não era apenas impressionantemente brilhante, mas colorido. O grão radiante arrematado pelo asteróide 3200 Phaethon abriu caminho através da atmosfera da Terra por mais de 60 vezes o diâmetro angular da Lua. As cores nos meteoros geralmente se originam de elementos ionizados liberados à medida que o meteoro se desintegra, com o azul esverdeado tipicamente originando-se de magnésio, cálcio irradiando violeta e níquel brilhando em verde. Vermelho, no entanto, normalmente se origina de nitrogênio e oxigênio energizado na atmosfera da Terra. Esta brilhante bola de fogo meteórica desapareceu num piscar de olhos – menos de um segundomas – deixou uma trilha de ionização que permaneceu visível por vários minutos, cujo início pode ser visto aqui.

 Crédito de texto e direitos autorais: Júlia MachadoCrédito de imagem e direitos autorais: Dean Rowe

NASA

165 thoughts on “Um meteoro geminado do arco-íris

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