Online EM Algorithm for Latent Data Models

Online Expectation-Maximisation

Online Variational Bayes Inference for High-Dimensional Correlated Data

Oosterhoff dichotomy in the Galaxy and globular clusters in the Large Magellanic Cloud

Opacities for classical Cepheid models

Opacities of Molecules and Dust

Opacity enhancements in the stellar wind of 68 Cygni - Not 'shells' or 'puffs'

Opacity tables for Cepheid variables

Opacity, metallicity, and Cepheid period ratios in the galaxy and Magellanic Clouds

Open Boundary Conditions for Dispersive Waves.

OpenOrb: Open-source asteroid orbit computation software including statistical ranging

Operating a petabyte class archive at ESO

Operational halo orbit maintenance technique for SOHO

Optical and radio variability in blazars

Optical bias and hierarchical clustering

Optical conditions in a homogeneous spherical envelope

Optical detection of space debris using a large achromatic coronograph

Optical fluctuations from moving partially coherent sources

Optical observables in stars with non-stationary atmospheres

Optical properties of cometary dust