Einstein Telescope

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Official profile of the Einstein Telescope. The project "Preparatory Phase for the Einstein Telescope Gravitational Wave Observatory" has received funding from the EU’s Horizon Europe INFRADEV Programme under GA No 101079696

Black-and-white portrait of Romano Meijer speaking into a handheld microphone during a panel discussion, seated at a table with notes in front of him.
Group photo of participants in the Einstein Telescope Organisation Funders Group meeting, standing in a conference room beside a screen showing colleagues joining remotely.
Collage showing the production stages of a large mono-crystalline silicon mirror: raw ingot, machining, polishing, and robot figuring.
Large group photo of participants at the XVI Einstein Telescope Symposium in Aachen, standing in front of a building façade. A banner on the left shows the Einstein Telescope logo and the text “Einstein Telescope – XVI ETS Aachen,” while circular portraits of remote participants are displayed across the top of the image.
Exterior view of the CAOS building, the Centro Applicazioni Onde gravitazionali e Sismologia, under a bright sky.
Large cylindrical metal beam tube sections arranged on yellow supports inside an industrial facility, with additional tube sections and equipment in the background.
A hand holding two Einstein Telescope postcards in front of a blue banner for the ET Industry Computing Workshop 2026.
Side-by-side 3D schematic renderings of two underground Einstein Telescope layout options on a light grey background: a triangular three-arm configuration on the left and a two-L-shaped configuration on the right, both shown as semi-transparent tunnel networks with coloured internal structures.
Solar-powered monitoring station installed in a grassy hillside landscape, with a small instrument mounted on a pole beside a solar panel.
A group of nine people pose outside an ESA building beneath an ESA flag, standing in front of the curved wooden-and-glass facade.
Portrait of a smiling man standing outdoors in front of a mountain landscape under a bright blue sky with scattered clouds.
Aerial view of a wide rural landscape in Lusatia, with green fields, narrow roads, patches of forest and a reflective lake under a cloudy evening sky.
A long, rectangular multi-storey building with a pink facade and rows of windows stands beside a quiet road and grassy area under a clear blue sky.
Large group photo of conference participants standing in a cobblestone courtyard, with an arcaded, pale peach historic building surrounding the space. The group - about 40 people, many wearing name badges - poses in a line in front of a central doorway under bright afternoon sunlight and a clear blue sky.
A worker in a high-visibility jacket uses a laptop connected to measurement equipment housed in an open wooden box outdoors.
A long, cylindrical underground tunnel lined with lights, with large pipes and cables running along the walls and ceiling toward a distant vanishing point.
A group poses in a lecture hall in front of a projector screen showing a video-call grid, with two large monitors on either side.
3D cutaway rendering of a large underground industrial/scientific hall with multiple tall cylindrical tanks and blue vertical structures connected by horizontal piping; small groups of people on a raised walkway provide scale, and a lower level shows equipment rooms. Text in corner: “Photo Credit: Marco Kraan / Nikhef.”
Panel discussion on a stage in front of an audience; several speakers seated under stage lighting and black curtains.
Illustration of a binary system emitting concentric gravitational-wave ripples in the sky above a sunlit coastal town with terracotta rooftops, a domed church, and steep green cliffs along a calm blue sea.
Inside a long technical hall, two people walk alongside a large metallic cylindrical beam tube section; an overhead yellow crane spans the corridor.
Two researchers working on an outdoor measurement cabinet at the Lusatia candidate site near Bautzen, surrounded by fields and winter trees.
Portrait of a man in an orange T-shirt wearing a grey backpack harness with a blue carabiner, standing with arms crossed against a plain light background.
Three photos from a conference: a crowded lecture room with attendees seated and listening to a presentation; a poster session where participants talk in front of display boards; and a coffee-break area with people networking near a table of snacks and drinks, plus a small group discussing a poster beside a whiteboard.
A large group of Einstein Telescope Annual Meeting participants gathered indoors for a group photo, standing closely together and smiling at the camera. The photo is taken from an elevated viewpoint in a bright lobby with posters on the wall and large windows in the back.
Speaker presenting at the opening session of the 4th Einstein Telescope Annual Meeting in Opatija, with a slide titled “Do we master the ET technologies?” shown on a large screen. The audience listens and takes notes on laptops.
Visitors, including children and adults, experience virtual reality headsets at an interactive Einstein Telescope exhibition, surrounded by science-themed displays. Credit: Einstein Telescope EMR
An artistic visualisation of two black holes merging in deep space. The smaller black hole orbits and spirals into the larger one, surrounded by a glowing orange and red accretion disk, releasing intense energy and gravitational waves across the dark cosmic background.
A 3D-rendered visualization of the underground Einstein Telescope facility. The image shows a large, futuristic tunnel with tall cylindrical vacuum chambers and interconnected laser arms extending into the distance. Small human figures are visible for scale, illustrating the massive size of the structure.
A young woman with long brown hair sits at an outdoor café table, smiling softly at the camera.
A large tunnel boring machine seen head-on inside a circular underground tunnel, with workers in helmets standing nearby.
Engineers at CERN install a large cylindrical stainless-steel beam pipe section, suspended by a crane, as part of the Einstein Telescope pilot sector vacuum system.
Group photo of participants at the ETO General Meeting in Isola d’Elba, Italy, September 2025. Around 30 people stand outdoors by a pool with palm trees and the sea in the background, wearing conference badges and blue sunglasses.
Image: LIGO/J. Tissino (GSSI)/R. Hurt (Caltech-IPAC) This plot shows gravitational-wave signals recorded by the LIGO Hanford detector almost ten years apart. The top shows data from LIGO's first-ever detection of gravitational waves, an event called GW150914, captured in 2015. The bottom shows the signal known as GW250114, captured in 2025. Both events involve colliding black holes about 1.3 billion light-years away with masses between 30 to 40 times that of our Sun. The purple line shows the data, which are a combination of the signal plus background detector noise. The noise comes from a variety of sources, including seismic motions that jiggle giant mirrors inside LIGO. The green line shows the best-fit prediction from general relativity for each signal. The much lower noise seen today is thanks to cutting-edge improvements made to the LIGO detectors that hush unwanted noise.
Colorful chart of black hole and neutron star masses detected by LIGO–Virgo–KAGRA, showing hundreds of cosmic collisions.
Portrait of Rainer Weiss, an elderly man with glasses, short white hair, and a blue sweater, looking calmly at the camera against a softly blurred background.
Visualisations of the new Einstein Telescope baseline design. Left: triangular layout; right: L-shaped 2L layout. The coloured blocks represent underground caverns and technical infrastructure, showing reduced volume and optimised geometry.
A man giving a presentation using a “Pepper’s ghost” effect, appearing as a holographic figure. Behind him are two large circular projections: one showing handwritten notes and an artistic image of a galaxy, the other a portrait of Sir Isaac Newton. (Einstein Telescope EMR)
Marc Andrés Carcasona Portrait of a man wearing a dark blazer over a white shirt. He is outdoors on a sunny day, with blurred steps, grass, and trees in the background.
White text on a bright blue background with the Einstein Telescope logo. The text reads: “ET Blue Book has been cited over 100 times on INSPIRE!”
A group photo of ET-PP Annual Meeting participants taken on the rooftop terrace under a bright blue sky. The attendees, wearing conference badges, are standing and smiling against a backdrop of city buildings.
Exterior view of the Scottish Event Campus (SEC) in Glasgow, featuring the iconic curved architecture of the Armadillo building and the SSE Hydro arena under a blue sky with scattered clouds.
Infographic titled "Meet GW231123: a gravitational-wave signal from the most massive binary black hole observed to date". It highlights the November 23, 2023 detection by LIGO–Virgo–KAGRA of two merging black holes—103 and 137 times the mass of the Sun—producing a final black hole over 225 solar masses. The event was observed by LIGO Hanford and Livingston for 0.1 seconds. A visual chart shows the masses in comparison to typical black hole ranges, noting the "upper mass gap." An inset suggests a "hierarchical origin story"—the merging black holes may have formed from previous mergers. The infographic emphasises the black holes' rapid spins (80–90% of the maximum theoretical spin rate) and shows their detection from a distance of 2–13 billion light-years. A world map marks the locations of LIGO, Virgo, and KAGRA detectors. Credit: Simona J. Miller / Caltech
Map of Germany highlighting the locations of the nine large-scale research infrastructure projects selected in the national prioritisation process (Forschungsinfrastruktur – FIS). Each project is marked with a labeled blue circle (letters C, D, E, H, I, L, P, R, S) corresponding to its acronym and institution. The Einstein Telescope (labelled "E") is included and linked to RWTH Aachen, Universität Münster, Ruhr-Universität Bochum, and Technische Universität Dresden. The map was published by the German Federal Ministry of Education and Research (BMBF).
A speaker holds a microphone while seated during a panel discussion at the Italy Pavilion at Expo 2025 Osaka. A banner behind him promotes Sardinia as a candidate site for the Einstein Telescope. A screen beside the speaker displays a graph of gravitational-wave observations. Audience members are visible in the foreground. Photo: Einstein Telescope IT
A person smiling in a pale pink strapless dress with a white fur shawl, holding a diploma tube from Vrije Universiteit Amsterdam while seated outdoors in a city square.
A ribbon-cutting ceremony at the GALILEO laboratory. A group of people in safety helmets stand in an underground corridor. One man, smiling, cuts a red ribbon in front of a bright green door marked L2060. Others, including scientists and officials, look on with interest.
Portrait of a person in a yellow polo shirt, facing the camera against a neutral background.
Rendered illustration of the Einstein Telescope’s underground vacuum infrastructure, featuring red support structures, colored laser beams, and engineers inspecting components inside a tunnel. Marco Kraan/Nikhef