Objective-prism survey of em. objects in M31 (Meyssonnier+ 1993)

Objectively Identified Young Clusters in NGC 6822

Objectives for Atmospheres and Ring Science for the Jupiter Icy Moons Orbiter

Objects of 1988 Zenith Sky Survey (Verkhodanov, 1994)

Oblique Shocks in Extragalactic Relativistic Jets

Obliquity variations of terrestrial planets in habitable zones

Obliquity Variations of Terrestrial Planets in Habitable Zones

Obliquity-Controlled Water Vapor/Trace Gas Feedback in the Martian Greenhouse Cycle

Obscuration and star formation in NGC 253 - H-alpha and near-infrared forbidden S III line imagery

Obscured Quasars and AGN

Observable characteristics of extraterrestrial technological civilisations

Observable effects of convection and gravity waves on the Venus condensational cloud

Observable Effects of Post-Impact Hydrothermal Systems Incorporating Freezing

Observable Signatures of Cosmic Reionization and the End of the Dark Ages

Observation and Analysis of High Resolution Optical Line Profiles in Comet Hyakutake (C/1996 B2)

Observation and characterization of an optical spring

Observation and implications of nonlinear elastic wave response in rock

Observation and interpretation of Hα polarization in solar flares.

Observation and interpretation of the asymmetric Stokes Q, U, and V line profiles in sunspots

Observation and preliminary analysis of a recent Jovian satellite phenomenon