Radio interferometry and its application to arrays of element antennas enable sensitive
studies of celestial objects with angular resolutions comparable with, or surpassing, optical …

The Event Horizon Telescope (EHT) has opened a new window on supermassive black
holes. With the advent of millimeter and submillimeter very long baseline interferometry …

The apparent position of jet base (core) in radio-loud active galactic nuclei changes with
frequency because of synchrotron self-absorption. Studying this 'core shift'effect enables us …

High-resolution imaging of supermassive black hole shadows is a direct way to verify the
theory of general relativity under extreme gravity conditions. Very Long Baseline …

The C-metric is a solution to Einstein's vacuum field equation that describes an accelerating
black hole. In this paper we discuss the propagation of light rays and the resulting lensing …

In May 2022 ICRANet organized the Workshop dedicated to the 80th anniversary of
Professor Ruffini. This paper is based on the talk delivered at the meeting. Professor Ruffini …

In the framework of Randall--Sundrum theory with extra dimension Reissner--Nordstr\" om
black hole solutions with a tidal charge have been found. The shadow around the …

China is planning to launch a relay satellite in the coming years with a payload for the Earth–
Moon very-long-baseline interferometer observation research and scientific applications …

The possible association with the high-energy neutrino event IceCube-170922A has
sparked interest in the blazar TXS 0506+ 056. We present 72 instantaneous 1–22 GHz …

The article provides a review of aerial vehicles developed and constructed by the company
and a description of automated spacecraft under development in the near-term outlook. The …