We investigate the cosmology of x-matter with pressure, px, and density, ρx, related by px=w0ργx(w0 0). For γ >1, this x-matter behaves like a cosmological...

The angular size of the broad line region (BLR) of the nearby active galactic nucleus NGC 3783 has been spatially resolved by recent observations with VLTI...

Inversions of spectropolarimetric observations of penumbral filaments deliver the stratification of different physical quantities in an optical depth scale...

Surveys have shown that super-Earth and Neptune-mass exoplanets are more frequent than gas giants around low-mass stars, as predicted by the core accretion...

Measures of exoplanet bulk densities indicate that small exoplanets with radius less than 3 Earth radii (R ⊕) range from low-density sub-Neptunes containing...

Astronomers have discovered thousands of planets outside the Solar System 1, most of which orbit stars that will eventually evolve into red giants and then into...

Astronomers have found more than a dozen planets transiting stars that are 10–40 million years old 1, but younger transiting planets have remained elusive. The...

The excellent sensitivity and optimum resolution of LoTSS DR2 at 144 MHz has enabled us to discover a giant radio galaxy (J1225+4011) with three distinct...

The study of dynamically cold stellar streams reveals information about the gravitational potential where they reside and provides important constraints on the...