16.11.13
Imagens do Mundo - Ipanema - Rio de Janeiro

Movimentação de banhistas e turistas na praia de Ipanema, no Rio de Janeiro (RJ), nesta sexta-feira (15), feriado da Proclamação da República - Alessandro Buzas/Futura Press
A imagem do dia 16-11-2013
2013 November 16
Active Comet ISON
Image Credit & Copyright: Babak Tafreshi (TWAN)

Image Credit & Copyright: Babak Tafreshi (TWAN)
Explanation: Falling
through planet Earth's predawn skies toward its
close encounter with the Sun on November 28, Comet ISON is coming
to life. The much anticipated comet has now been reported to have
substantially increased in brightness, surging to naked-eye visibility for dark
sites and sprouting a more complex
tail. ISON's tail stretches over two degrees in this telephoto
skyview from southern Kenya,
captured on the morning of November 14. Shown in two panels, the enlarged
negative version on the right makes details of the long tail easier to trace,
including the tail's separated filaments toward the
top of the frame. A sungrazer and first time visitor to the inner solar system,
the possibility of ISON's survival to become a
bright comet in planet Earth's December skies remains
a question.
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