O I lambda 8446 and NA I lambda 5893 in the quasar 3C 273
O I lines in the sun and stars. I - Understanding the resonance lines
O II (83.4 nm) Emission Observation by the Extreme Ultraviolet Sensor onboard the Sounding Rocket SS-520-2
O II forbidden line and continuum structure in radio-loud QSOs to Z = 0.09
O II Recombination Lines and Temperature Fluctuations in m8 and M17
O II Stark broadening parameters (Mahmoudi+, 2005)
O III - Intercombination and forbidden lines
O III line ratios in the sun
O III recombination coefficients (Kisielius+, 1999)
O Iiject{HD 152248}: Evidence for a colliding wind interaction
O illuminating the wires of telescopes
O in Olivine: Cause for a Pronounced Electric Anomaly Around 600 deg C
O instrument contrived by him, illustrative of rotation
O isotope constraints on radiometric dating for UHP eclogite and granitic gneiss at Taohang in the Sulu terrane of east-central China
O isotope mapping of a Wark-lovering Rim in a Type A CAI: Constraints on its Formation Process
O Isotopic Constraints on the Origin of Mg-Rich Olivines from Allende Chondrules: Planetary or Not ?
O IV fluorescence in the symbiotic nova RR Tel
O IV radiative and excitation rates (Aggarwal+, 2008)
O IV temperature determination for NGC 7662
O Lacaille's catalogue of 398 stars