O atom production in water ice: Implications for O2 formation on icy satellites
O azimuths by the pole-star
O Barlow's fluid object-glass Telescope
O Barlow's new telescopes
O Bessel's improved lunar method
O Burmese Calendrics and Astronomy
O carater de Chern-Connes para C$^*$-sistemas dinamicos calculado em algumas algebras de operadores pseudodiferenciais
O celestial charts
O clearing a lunar distance of parallax and refraction
O computing the longitude from an occultation
O Current Systems Proposed for SD in the Theory of Magnetic Storms
O Deriving Geomagnetic Dipole-Field Coordinates from Cosmic-Ray Observations
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