Variable high-energy γ-ray emission from pulsar wind nebulae

Variable Hydrogen Emission in the Spectrum of γ Ursae Majoris.

Variable hydrogen lines in 15 kappa Cassiopeiae.

Variable Hα Emission and Absorption in Helium-Peculiar Stars

Variable Hα Emission in ɛ Aurigae

Variable Infrared Emission from the Supermassive Black Hole at the Center of the Milky Way

Variable infrared radiation from X-ray sources 4U 0115 + 634 and A 0535 + 262

Variable interstellar absorption toward HD 72127A. II - 1981-1988

Variable Interstellar Absorption toward the Halo Star HD 219188 - Implications for Small-Scale Interstellar Structure

Variable Intrinsic Absorption in Mrk 279

Variable Iron K-alpha Lines in Seyfert 1 Galaxies

Variable iron-line emission near the black hole of Markarian 766

Variable Light-Cone Theory of Gravity

Variable line profiles due to non-axisymmetric patterns in an accretion disc around a rotating black hole

Variable Linear Polarization from Sagittarius A*: Evidence for a Hot Turbulent Accretion Flow

Variable linear polarization in the X-ray binary HD 77581

Variable Low-Mass X-ray Binaries in Early-Type Galaxies

Variable Ly alpha sheds light on the environment surrounding GRB 090426

Variable mass loss in P Cygni

Variable Mass Theories of Gravity