The orbit of the star S2 around SgrA* from VLT and Keck data
The Orbital Period of V368 Aquilae (Nova Aquilae 1936 No. 2)
The Orbital Structure of Triaxial Galaxies with Figure Rotation
The orbits of open clusters in the Galaxy
The orientation and kinematics of inner tidal tails around dwarf galaxies orbiting the Milky Way
The orientations of molecular clouds in the outer Galaxy: Evidence for the scale of the turbulence driver ?
The Origin and Distribution of Cold Gas in the Halo of a Milky Way-Mass Galaxy
The origin and orbit of the old, metal-rich, open cluster NGC 6791: Insights from kinematics
The origin and physical mechanism of the ensemble Baldwin effect
The Origin and Shaping of Planetary Nebulae: Putting the Binary Hypothesis to the Test
The origin of an extended X-ray emission apparently associated with the globular cluster 47 Tucanae
The origin of carbon: Low-mass stars and an evolving, initially top-heavy IMF?
The origin of large peculiar motions of star-forming regions and spiral structures of our Galaxy
The Origin of OB Runaway Stars
The Origin of Parsec-Scale Gaseous and Stellar Disks in the Galactic Center and AGNs
The origin of RXJ1856.5-3754 and RXJ0720.4-3125 -- updated using new parallax measurements
The origin of S-stars and a young stellar disk: distribution of debris stars of a sinking star cluster
The Origin of Segue 1
The origin of the Guitar pulsar
The Origin of the Hot Gas in the Galactic Halo: Confronting Models with XMM-Newton Observations