O bservat ó rio
N acional
Certificate
I, Marcelo Borges Fernandes, chair of the "Workshop on Stellar Astrophysics at Observatório Nacional:
Stellar Evolution and Stars in Transition Phases" certify that
João Victor Sales Silva
participated in the event
R i o d e J a n e i r o, D e c e m b e r 1 1 t h 2 0 1 2
Dr. Marcelo Borges Fernandes
Observatório Nacional / MCTI
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Joao Victor Sales Silva