Watch Free Online on Hurawatch. The celestial map organized by Professor Manuel Pereira Reis, which allows you to view the sky in Rio de Janeiro at any time of any day of the year. In a simplified copy of this device, in which only the main stars appear as if reflected in a horizontal mirror, the inner disc, that of the stars, coincides with the outer disc of hours and days as it rotates. This allows you to view aspects of the sky on various dates in various months.