O the distance of a Comet from the Earth
O the distance of a Comet from the Earth
O the Diversity of Plausible Planetary Systems (Invited Talk)
O the division in the exterior ring of Saturn
O the Dynamical Structure of the Jet System in the Disk with the Keplerian Rotation
O the Fifth Force and the Structure of Neutron Star
O the flexure of a boarded floor
O the formula for the computation of precession
O the geocentric places of the planets
O the increase of magnitude in η Argus
O the instruments used, by Dr. Halley at Greenwich
O the International Radio Astronomy Observatory on Plateau Suffa
O the latitude and longitude of the Cape Observatory
O the latitude and longitude of the Cape Observatory
O the latitude of his observatory at Ashurst
O the length of pendulums
O the length of pendulums
O the lengths of pendulums
O the limits of errors in the planetary tables
O the longitude of Calcutta, Madras, &c