Oblique solitary Alfvén modes in relativistic electron-positron plasmas

Obliquely propagating electrostatistic solitary structures in a hot magnetized dusty plasma with vortex-like electron distribution

Obliquely propagating ion-acoustic waves in a magnetized electron-positron-ion plasma with trapped electrons

Obliquely propagating nonlinear structures in dense dissipative electron positron ion magnetoplasmas

Obliquity and magnetic dipole radiation from collapsing, rotating, magnetized stars

Obliquity evolution of extrasolar terrestrial planets

Obliquity of the Ecliptic

Obliquity Tides on Hot Jupiters

Obscuration and circumnuclear medium in nearby and distant AGN

Obscuration and Origin of Nuclear X-ray emission in FR I Radio Galaxies

Obscuration by Diffuse Cosmic Dust

Obscuration in extremely luminous quasars

Obscuration in LINERs. The narrow line region

Obscuration in the Host Galaxies of Soft X-ray Selected Seyferts

Obscuration model of Variability in AGN

Obscuration of Active Galactic Nuclei by Circumnuclear Starbursts

Obscuration of Quasars by Dust and the Reddening Mechanism in Parkes-Quasars

Obscuration of the Parsec Scale Jets in the Compact Symmetric Object 1946+708

Obscured accreting black holes at high redshift

Obscured Accretion and Black Holes