Variability of the EUV quiet Sun emission and reference spectrum using SUMER

Variability of the extreme PCygni star HDE 326823.

Variability of the extreme z=4.72 blazar, GB 1428+4217

Variability of the Fe K line relativistic component in a sample of Seyfert 1 galaxies

Variability of the gravitational mirage P.G. 1115+080

Variability of the H-alpha emission in Phi Per

Variability of the H-beta line profiles as an indicator of orbiting bright spots in accretion disks of quasars: a case study of 3C 390.3

Variability of the H2O maser associated with the M-supergiant S Persei

Variability of the H2O maser associated with the Mira variable RS Virginis

Variability of the Halpha emission of Cygnus X-1 and its connection with the soft X-ray radiation

Variability of the He I λ5876 Å line in early type chemically peculiar stars. II

Variability of the HeI5876 A line in early type chemically peculiar stars

Variability of the High-Magnetic Field X-ray Pulsar PSR J1846-0258 Associated with the Supernova Remnant Kes 75 as Revealed by the Chandra X-ray Observatory

Variability of the hydrogen and calcium emission in the spectrum of SU AUR

Variability of the hydrogen and calcium emission in the spectrum of SU Aur

Variability of the hydrogen lines in the spectrum of the peculiar star HD 184905

Variability of the H_2O maser associated with U Orionis

Variability of the Hα spectral line in the interacting binary AX Monocerotis

Variability of the Hβ broad emission line in agn

Variability of the iron K-emission line in the Seyfert 1 galaxy NGC 3516