Astronomy news
Invisible jets from tiny black holes sculpt the Galaxy
Black holes, even relatively small ones, leave dramatic “footprints” in space that extend far beyond their immediate vicinity—like ripples from a pebble dropped in a pond. New research using the MeerKAT radio telescope reveals that stellar-mass black holes (those formed from collapsed stars) shoot powerful jets of energy creating massive shockwaves, effectively carving out space and influencing their galactic neighbourhoods over thousands of years. The discoveries show smaller black holes play a much more significant role in shaping galaxies than previously thought. These findings are published today in two studies featured in the scientific journal Astronomy & Astrophysics.
Astronomers Astonished: Enigmatic Distant Radio Bursts Appear to be Neutron Stars
Using the radio telescope at Westerbork, The Netherlands, astronomers have discovered two dozen of the unexplained Fast Radio Bursts. After zooming in on the signal of the distant bursts, the astronomers found a striking similarity to the radio flashes emitted by nearby, known neutron stars. The discovery is remarkable because these nearby neutron stars already produce more energy than anything achievable on Earth. The distant stars that emit the Fast Radio Bursts must somehow generate an astounding one billion times more energy than the nearby ones.
European Pulsar Timing Array Wins Two Prestigious Awards
The European Pulsar Timing Array (EPTA) has been honored with two major awards for its groundbreaking work in gravitational wave astronomy. In 2024, the team received the International Congress of Basic Sciences (ICBS) Frontiers of Science Award in China, followed by the Royal Astronomical Society (RAS) Group Achievement Award in the United Kingdom in 2025.These accolades celebrate the team’s innovative use of pulsar timing to detect low-frequency gravitational waves. The EPTA is a collaborative effort involving scientists from more than ten institutions across Europe. ASTRON is one of the participating organisations in this project with its most sensitive radio telescope including the Westerbork Synthesis Radio Telescope. (WSRT).
Using short radio flashes to probe the remnants of neutron star mergers
What happens after neutron stars merge? Dr. Antonia Rowlinson has received an ERC Consolidator Grant to find an answer to that fundamental question.
Gargantuan Black Hole Jets Are Biggest Seen Yet
Astronomers have spotted the biggest pair of black hole jets ever seen, spanning 23 million light-years in total length. That’s equivalent to lining up 140 Milky Way galaxies back to back.
Second-Generation Starlink Satellites Leak 30 Times More Radio Interference, Threatening Astronomical Observations
Observations with the LOFAR (Low Frequency Array) radio telescope last year showed that first generation Starlink satellites emit unintended radio waves that can hinder astronomical observations. New observations with the LOFAR radio telescope, the biggest radio telescope on Earth observing at low frequencies, have shown that the second generation ’V2-mini’ Starlink satellites emit up to 32 times brighter unintended radio waves than satellites from the previous generation, potentially blinding radio telescopes and crippling vital research of the Universe.
Women Astronomers Day 2024
Today, August 1st, marks Women Astronomers Day. Throughout history women astronomers have played a vital role in the development of astronomy and have made important astronomical discoveries.
Origin of fast radio bursts come into focus through polarized light
Non-repeating fast radio bursts (FRBs) probably originate from galaxies similar to our Milky Way.
Violette Impellizzeri to head astronomy and operations department
We are excited that Dr Violette Impellizzeri will join ASTRON as head of the Astronomy & Operations department. She will start her new duties on 1 September 2024. Her research focus is on VLBI investigations of the molecular gas enveloping black holes and spectral line analyses.
New calibration technique circumvents Earth’s ionosphere
An international team of researchers has developed a new calibration technique to circumvent disturbances of Earth’s ionosphere.
Telescope quartet reveals surprising statistics of cosmic flashes
Scientists led by Chalmers astronomer Franz Kirsten have studied a famous source of repeating fast radio bursts – a still unexplained cosmic phenomenon. Comparing with earlier measurements, the scientists draw a conclusion with far-reaching consequences: any source of fast radio bursts will repeat, if watched long enough and carefully enough. The research team, a unique collaboration between professional and amateur radio astronomers, used four telescopes in northern Europe, amongst which ASTRON’s Westerbork Synthesis Radio Telescope.
Dutch astronomers prove last piece of gas feedback-feeding loop of black hole
Three astronomers from the Netherlands have proven that gas that was previously heated near a supermassive black hole and flowed to the outskirts of the galaxy and cooled down, is moving back towards the black hole. While there had been indirect evidence for this theory, this is the first time that the cooled gas moving toward the black hole has actually been observed.