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Telescopes

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

Astronomy

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.

Beschermingszones


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
happen.

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

Sweden and the United Kingdom Join the LOFAR ERIC

Sweden and the United Kingdom have joined the LOFAR ERIC (European Research Infrastructure Consortium) as a member, following the decision of the Council on 26 March 2025. This significant expansion brings the total membership to eight countries, marking an important milestone in the growth of this pioneering research infrastructure.

LOFAR
Published by the editorial team, 1 May 2025

ASTRON receives €4.6 million to widen and sharpen LOFAR’s cosmic vision

The Dutch Research Council (NWO) has awarded over €4.6 million to ASTRON, the Netherlands Institute for Radio Astronomy, for a major upgrade to the Low-Frequency Array (LOFAR) radio telescope. The project, called LOFAR Enhanced Network for Sharp Surveys (LENSS), will significantly increase LOFAR’s observational capabilities, enabling astronomers to view four times more of the sky simultaneously while producing images with unprecedented clarity.

LOFAR
News
Published by the editorial team, 28 April 2025

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.

Astronomy
News
Published by the editorial team, 25 April 2025

‘Beyond what we’d hoped’: international telescope in Australia captures first glimpse of the Universe

The first image from the international SKA Observatory’s telescope in Australia, SKA-Low, has been released – a significant milestone in its quest to reveal an unparalleled view of our Universe.

Science
SKA
Published by the editorial team, 17 March 2025

New Technology for Ultra-Fast Data Transfer: SURF and ASTRON Establish 400G Connection

Astronomers Astonished: Enigmatic Distant Radio Bursts Appear to be Neutron Stars

European Pulsar Timing Array Wins Two Prestigious Awards

Roelien Attema named as Netherlands Academy of Engineering Fellow

Using short radio flashes to probe the remnants of neutron star mergers

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DAILY IMAGE

The Electron Density Structure of the Milky Way

© Stella Ocker (Caltech)

The time has come for a new electron density model of the Milky Way. Galactic electron density models describe the multi-component, multi-scale structure of the ionized interstellar medium (ISM). These models are routinely used to predict the distances of radio sources lacking independent distance measures, in addition to forward modeling the dispersion and scattering of pulsars, fast radio bursts (FRBs), active galactic nuclei, and masers. In this talk I will discuss the developments motivating construction of a new electron density model, and some key puzzles that face our understanding of multi-scale electron density structure in our Galaxy. Unlike previous models, large-scale surveys of the ionized ISM are being actively folded into the model construction. Specific case studies will be discussed to demonstrate how characterization of the Galactic electron density affects our understanding of extragalactic FRBs and their use as cosmic probes.
ASTRON daily image.
EVENTS

CASPER Workshop 2025

Mon 08 Sep 2025 - Fri 12 Sep 2025

The CASPER workshop is a semi-annual workshop where FPGA, GPU, and general heterogeneous system programmers get together to discuss new instruments in radio astronomy, as well as the tools and libraries for developing and manipulating these instruments.

@astron

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