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ASTRON is responsible for the operations of the Westerbork Synthesis Radio Telescope (WSRT) and the Low Frequency Array (LOFAR).


The astronomical research at ASTRON is closely aligned with the strengths of our facilities LOFAR and WSRT-APERTIF.

Diversity & Sustainability

ASTRON is committed to achieving a fair, welcoming, and sustainable work environment for all.


Met onze radiotelescopen nemen wij de meest zwakke signalen uit het heelal waar. Daardoor zijn zij kwetsbaar voor elektromagnetische storing. Met het tijdig treffen van de juiste maatregelen kan storing worden voorkomen.

Wireless Data Lab

Draadloze techniek lijkt vanzelfsprekend, maar de ontwikkeling ervan gaat niet vanzelf. Daarom hebben we bij ASTRON een proeftuin ingericht; het Wireless Data Lab.

Making discoveries
in radio astronomy

ASTRON is the Netherlands Institute for Radio Astronomy, and is part of the Institutes organisation of NWO.

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.

Published by the editorial team, 6 May 2024

ASTRON has turned 75!

75 years ago today, SRZM (Stichting Radiostraling van Zon en Melkweg/Netherlands Foundation for Radio Astronomy) was founded. This organization would later become ASTRON.

Published by the editorial team, 23 April 2024

ASTRON launches database of female experts

Today marks International Women’s Day. This year’s theme is ‘Inspire Inclusion’.

Published by the editorial team, 8 March 2024

LOFAR ERIC: Distributed Research Infrastructure for European Astronomical Research Launched

LOFAR ERIC (European Research Infrastructure Consortium) has been officially launched at its first Council meeting today. The world-leading LOFAR (LOw Frequency ARray) Distributed Research Infrastructure has already revolutionised low-frequency radio astronomy research, resulting in an avalanche of scientific publications in the past decade. LOFAR ERIC is now a single legal entity across the European Union. The LOFAR ERIC statutory seat is in Dwingeloo, the Netherlands, hosted by NWO-I/ASTRON (Netherlands Institute for Radio Astronomy; the original designer of LOFAR).

Published by the editorial team, 22 January 2024

Telescope quartet reveals surprising statistics of cosmic flashes

Dutch astronomers prove last piece of gas feedback-feeding loop of black hole

Super sharp images reveal a possible hypernebula powered by a source of fast radio bursts

Astronomers discover ultra-fast radio bursts in archived data

ERC Starting Grant Awarded to Dr. Aditya Parthasarathy


A special lens for Jekels Jacht

© NTR/Rik ter horst

In his program 'Jekels Jacht', Diederik Jekel revisits significant experiments from our rich scientific history, recreating them to highlight their importance and impact. In the episode airing on May 15, Jekel focuses on the Nobel Prize-winning Phase Contrast Microscope. This groundbreaking microscope was invented by physicist Frits Zernike in 1933 and constructed by Caroline Bleeker, a highly skilled Dutch instrument maker.

The Phase Contrast Microscope revolutionized the way scientists observe transparent specimens, allowing them to see details without staining or killing the samples. Zernike's invention profoundly impacted biological and medical research, earning him the Nobel Prize in Physics in 1953.

In this episode, Diederik Jekel undertakes the challenge of creating a precise replica of Zernike's microscope. Elfi Dijkstra and Rik ter Horst (NOVA) contributed their expertise by crafting a special lens and lens mount, critical components for the accurate reproduction of the original instrument.

Curious to see if the efforts were successful? Watch the entire episode and witness the recreation of this pivotal scientific tool.

The full program can be viewed here:

ASTRON daily image.

Open Dag: 6 oktober/Open Day: October 6th

Sun 06 Oct 2024

English follows Dutch   Bezoek ons tijdens onze open dag op 6 oktober Hoe klinkt een dode ster? Hoe maak je onzichtbaar licht zichtbaar? Hoe werkt een zwart gat? Waarom kun je met een radiotelescoop terug in de tijd kijken? Achter al deze en nog veel meer interessante dingen kom je tijdens onze open dag […]


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