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.


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.
Two ERC Starting Grants awarded to (space) weather research projects with the LOFAR radio telescope

The European Research Council (ERC) has awarded two of its prestigious Starting Grants to ASTRON scientists for research projects using the LOFAR radio telescope. One project will use LOFAR to create detailed images of lightning on Earth, the other aims to detect space weather events and magnetic fields around exoplanets.

Jessica Dempsey appointed director of ASTRON

The board of the Dutch Research Council’s institute organisation has appointed Prof. Dr. Jessica Dempsey as director of ASTRON, the Netherlands Institute for Radio Astronomy.

Volcanic ‘activity’ in black holes blows monumental bubbles spanning hundreds of thousands of light years

An international team of researchers, which included astronomers from the Netherlands Institutes for Radio Astronomy (ASTRON) and Space Research (SRON) as well as Leiden University, observed the full extent of the evolution of hot gas produced by an active black hole for the first time.

Inheemse blik op de hemel in Leiden tentoongesteld

Op zaterdag 16 oktober opent de bijzondere tentoonstelling Onder onze hemel (origineel Shared Sky), een culturele blik op de sterrenhemel door Aboriginal Australische en Zuid-Afrikaanse artiesten, in de Oude Sterrewacht in Leiden.

Aurorae discovered on distant stars suggest hidden planets
Periodic Fast Radio Burst found bare, unobscured by strong binary wind
Most detailed-ever images of galaxies revealed using LOFAR
Vidi grant awarded to astronomer Harish Vedantham
What does the start of construction of SKA mean for the project and the Netherlands?
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Colloquium: The Canadian Hydrogen Observatory and Radio-transient Detector (CHORD)


In recent years, radio observatories have been reshaped by rapid developments in the digital and telecommunications sectors. Technological advancements have allowed for faster surveys, larger fields-of-view, and a multiplicity of commensal studies, with corresponding scientific returns.

Building off the experience and knowledge developed on the highly successful Canadian Hydrogen Intensity Mapping Experiment (CHIME), the Canadian Hydrogen Observatory and Radio-transient Detector (CHORD) is a large-N, small-D, ultra-wideband radio array under construction in Canada. Using a dense-packed “core” array of 512x 6m dishes located immediately next to CHIME, CHORD will observe over a 5:1 band spanning 300-1500MHz. Two smaller “outrigger” stations, located at VLBI distances, will supplement the core for high-precision astrometry.

CHORD will commensally produce and process a wide range of data products feeding a variety of studies, from cosmological 21cm intensity mapping to Fast Radio Burst (FRB) discovery & localization. In this talk, I will discuss the background, motivation, and design of the array, followed by current progress and prototyping efforts. Full funding for CHORD was recently secured, with construction taking place over the coming 3 years and first light scheduled for 2025.


Applied RF technology course

Mon 14 Mar 2022 - Thu 17 Mar 2022

The RF course is an excellent introduction for Digital / Analog engineers who are or will be involved in the development of RF systems.


Latest tweets

Burgemeester @JagerRikus van @gem_westerveld nam deze mooie nieuwjaarstoespraak o.a. bij ASTRON op!

Hij noemt o.a. ons nieuwe #WDL (, onze nieuwe directeur @astroTui en waardering voor de mensen met een afstand tot de arbeidsmarkt die bij ons werken.

Daily Image of the Week: Two ERC Starting Grants awarded to (space) weather research projects with the LOFAR radio telescope

Deadline for applications for our summer research proramme is 31 January 2022!

For all information see or the AAS website:

🎉We are proud! Two ERC Starting Grands awarded to ASTRON employees Brian Hare & Harish Vedantham!

One project will use @LOFAR to create detailed images of lightning, the other aims to detect space weather events & magnetic fields around exoplanets: