Two Epochs of Very Large Array Observations of Water Maser Emission in the active galaxy NGC 6240
Two formation channels of UCDs in Hickson Compact Groups
Two fossil groups of galaxies at z~0.4 in the COSMOS: accelerated stellar-mass build-up, different progenitors
Two hundred years of galactic studies in Tartu Observatory
Two Lensed z~3 Lyman Break Galaxies Discovered in the SDSS Giant Arcs Survey
Two long HI tails in the outskirts of Abell 1367
Two Moderate-Redshift Analogs to Compact Massive Early-Type Galaxies at High Redshifts
Two Physically Distinct Populations of Low-Ionization Nuclear Emission-Line Regions
Two Populations of Molecular Clouds in the Antennae Galaxies
Two ten-billion-solar-mass black holes at the centres of giant elliptical galaxies
Two Type Ic supernovae in low-metallicity, dwarf galaxies: diversity of explosions
Two types of Lyman-alpha emitters envisaged from hierarchical galaxy formation
Two types of shock in the hotspot of the giant quasar 4C74.26: a high-resolution comparison from Chandra, Gemini & MERLIN
Two-dimensional H_alpha kinematics of bulgeless disk galaxies
Two-dimensional kinematics of SLACS lenses - IV. The complete VLT-VIMOS data set
Two-dimensional kinematics of SLACS lenses: II. Combined lensing and dynamics analysis of early-type galaxies at z = 0.08 - 0.33
Two-dimensional kinematics of SLACS lenses: III. Mass structure and dynamics of early-type lens galaxies beyond z ~ 0.1
Two-Dimensional Magnetohydrodynamic Simulations of Barred Galaxies
Type 1 Active Galactic Nucleus Fraction in SDSS/FIRST Survey
Type 1 AGN at low z