Hubble Space Telescope images of a supernova in nearby galaxy M82
A new bright supernova exploded in the nearby galaxy M82 on January 14 this year, at a distance of approximately 11.5 million light–years from Earth, that makes it to the nearest "normal" Type Ia supernova discovered in the past 42 years. Its small distance together with the fact that the first [...] (Read post)
The first gravitational lens seen in Gamma-rays
The Fermi satellite was launched in 2008 and since then it has continuously monitored the sky at gamma-ray energies above 100 MeV. Most of the sources detected at these energies are blazars, Active Galactic Nuclei in which the accretion onto a supermassive black hole also leads to the launching of two opposite relativistic jets.