An international team of researchers led by astronomers from Leiden University (Netherlands) has produced the first sharp radio maps of the universe at low frequencies. Thanks to a new calibration technique, they bypassed the disturbances of the Earth’s ionosphere. They have used the new method to study plasmas from ancient black hole bursts. Potentially, the … Read more
Imagine measuring the ever-expanding universe with a ruler that constantly stretches. That’s the challenge cosmologists face when determining the Hubble constant (H0), a value reflecting the universe’s expansion rate and ultimately its age and size. Conflicting H0 measurements derived from various objects highlight the need for better cosmic distance measurement tools. Enter red giant stars, … Read more
A team of physicists has developed a method to detect gravity waves with such low frequencies that they could unlock the secrets behind the early phases of mergers between supermassive black holes, the heaviest objects in the universe. The method can detect gravitational waves that oscillate just once every thousand years, 100 times slower than … Read more
European astronomers recently conducted extensive Very Long Baseline Interferometric (VLBI) observations on the radio jet structure of PKS 2215+020, a powerful quasar. The acquired VLBI data yielded crucial insights into the characteristics of this jet, indicating that PKS 2215+020 exhibits traits typical of a blazar. These findings, unveiled on February 17 in the Universe journal, … Read more