O celestial charts
O clearing a lunar distance of parallax and refraction
O computing the longitude from an occultation
O determining the declinations of 2 stars with one mural circle
O determining the mass of the moon
O differences in the catalogues of Piazzi and Bessel
O double object-glasses
O eclipses and occultations at Wilna
O eclipses observed at Benares
O efeito do achatamento nos pontos de equilíbrio e na dinâmica de sistemas coorbitais
O Ensino de Astronomia nas Cidades de Ribeirão Pires e Rio Grande da Serra
O Ensino de Astronomia: Desafios para Implantação
O errors in logarithmic tables
O errors in the declinations of Jupiter in the Connaissance des Tems, 1831
O errors in the places of the planet Ceres in White's Ephemeris, 1830
O finding the longitude
O finding the time by two stars on the same vertical
O Flamsteed's observations
O Fraunhofer's telescope
O i 63 Micron-determined Mass-Loss Rates in Young Stellar Objects