O & B stars uvby-Hβ photometry. III. (Kaltcheva+, 2000)
O 18 / O 16 of feldspars in carbonate rocks
O 18 /O 16 ratios of some chondritic meteorites and terrestrial ultramafic rocks
O a Pitot-Tube Method of Upper-Atmosphere Measurements
O a Self-Exciting Process in Magneto-Hydrodynamics
O adsorption and incipient oxidation of the Mg(0001) surface
O AN Interplanetary Magnetic Field
O and H diffusion in uraninite: Implications for fluid-uraninite interactions, nuclear waste disposal, and nuclear forensics
O and N2 disturbances in the F region during the 20 November 2003 storm seen from TIMED/GUVI
o And: A New Active Episode?
o And: another major shell phase just coming?
O And: Confirmation of a New Emission-Line Episode
o And: polarization observations of 1982 april evince the recent shell episode
O Anomalies in Interstellar Dust Size Fractions
O atom production in water ice: Implications for O2 formation on icy satellites
O Current Systems Proposed for SD in the Theory of Magnetic Storms
O Deriving Geomagnetic Dipole-Field Coordinates from Cosmic-Ray Observations
O I /7774 A/ and O I /8446 A/ emissions in aurora
O I 630.0-nm dayglow in the region of equatorial ionization anomaly - Temporal variability and its causative mechanism
O II Stark broadening parameters (Mahmoudi+, 2005)