Telescópio Kepler descobre 70 candidatos a exoplanetas !

Telescópio Kepler! Entre mais de 50 mil estrelas, há pelo menos 70 possíveis planetas escondidos. A descoberta realizada por cientistas do MIT, nos Estados Unidos, foi publicada no periódico Astronomical Journal. Os dados foram processados semanas após chegarem na Terra, tornando o evento ainda mais empolgante, já que normalmente demora entre alguns meses e um ano.

As observações ocorreram em períodos espaçados de 80 dias por meio da K2, missão que segue os passos do trabalho realizado pelo Telescópio Espacial Kepler da NASA e faz suas buscas atrás da Terra, analisando estrelas que são difíceis de serem observadas caso o planeta não esteja em uma posição específica em relação ao Sol. 

Telescópio Kepler em tempo recorde, os astrônomos identificaram 80 possíveis exoplanetas.

“Nossa experiência trabalhando na K2 há quatro anos nos leva a acreditar que a maioria desses são de fato planetas prontos para serem confirmados ou validados”, escrevem os autores da pesquisa.
Entre eles, encontra-se um planeta que orbita a estrela HD 73344, a mais brilhante já descoberta pela missão. Segundo os cientistas, o objeto passa por sua estrela a cada 15 dias e tem cerca de 2,5 vezes o tamanho da Terra e 10 vezes sua massa.
Localizado a 114 anos-luz da Terra, esse extraordinário planeta é ainda bastante quente, com temperaturas que oscilam entre 1,2 mil e 1,3 mil graus Celsius, o equivalente à temperatura da lava de um vulcão em erupção. Essas características e a sua proximidade da HD 73344 o tornam um candidato ideal para estudos de atmosfera e composição. “Pensamos que seria uma versão menor e mais quente de Urano ou Netuno”, afirmou o cientista Ian Crossfield, em anúncio.
Segundo ele, o possível exoplaneta pode dar pistas sobre todo o sistema. “Encontramos um dos planetas mais empolgantes já identificados durante toda a missão K2, e fizemos isso mais rápido do que antes”, explicou. “Isso mostra como estamos abrindo o caminho para a missão TESS da NASA fazer o mesmo por todo o céu ao longo dos próximos anos.”

 

Fonte: http://www.universoestelar.ml/2018/06/astronomos-descobrem-80-candidatos.html

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