Einstein Telescope

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.

A large group of formally dressed people pose for a photo outside an ornate historic building entrance, while a cyclist rides past in the foreground on a cobblestone street.

Einstein Telescope keeps growing 🌍✨ ~1,800 people across 30+ countries (90+ RUs, 260+ institutes). Welcoming a new Czech team: FZU 🇨🇿 - bringing laser/optics + software know-how. Full story on LinkedIn: www.linkedin.com/feed/update/...
Group photo by: DZA / Paul Glaser

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 group of students gathered around a table covered with LEGO pieces in a workshop/lab space, collaborating on a hands-on build activity.

Silhouettes of audience members seated in a dark room, watching a large dome-like projection of a star-filled, cosmic scene overhead.

A large lecture hall with tiered wooden benches, filled with students and attendees seated with laptops and notebooks, listening attentively during a talk.

Another busy week for #ET: Rome workshops on sustainability + early-career science, ET-SUnLab tender published, Einstein Academy students kick off, and ET-MEROPE works on correcting thermal beam distortions. Full roundup: www.linkedin.com/feed/update/...

Today, 11 February, #GW stands for two things: #GravitationalWaves 〰️ and #Girls&Women ❤️.
We mark 10 years since the first GW detection announcement (11 Feb 2016) and the International Day of Women and Girls in Science.
Both began in 2015 (GW150914). ✨

A worker in a high-visibility jacket uses a laptop connected to measurement equipment housed in an open wooden box outdoors.

Three officials seated at a wooden desk sign documents in a council chamber with red chairs and flags behind them.

Aerial architectural rendering of a modern multi-wing research building surrounded by trees and campus buildings, with people walking in the courtyard.

📸#ET_snapshot | What’s been happening around the Einstein Telescope lately 👇

shorturl.at/1Ewzv

📌 More updates + opportunities: lnkd.in/dH3xYPkx

A long, cylindrical underground tunnel lined with lights, with large pipes and cables running along the walls and ceiling toward a distant vanishing point.

🌟 Why ET goes underground: to escape surface noise (incl. Newtonian noise) and detect incredibly faint #gravitationalwaves. New article: facility concept, safety, and what it’s like to work below ground.
Read: lnkd.in/dwweVX29

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.

A group stands in an underground technical area beside a large metallic pipe with a copper strip and fittings; the photo is rotated sideways.

Participants sit around a long conference table while a presenter points to a slide titled ‘Personnel transport (evacuation means)’ projected at the front.

People gather around a guide in an industrial hall next to long cylindrical metal equipment under yellow overhead support frames.

Einstein Telescope infrastructure & safety depend strongly on the future site 🗺️🛡️. On 19–20 Jan 2026, ETO, candidate host consortia and CERN met to exchange key info 🤝, with additional experts joining online 💻
@cern.bsky.social

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.”

📢 16–17 Feb 2026 | Sapienza University of Rome
Workshop: “Einstein Telescope Research Infrastructure: Challenges and Long-Term Sustainability”
Who it’s for: researchers, tech & industry, LCA, smart energy & logistics, sustainable procurement, etc.
🗓️ Register by: 1 Feb 2026
➡️ shorturl.at/y36hC

Panel discussion on a stage in front of an audience; several speakers seated under stage lighting and black curtains.

Three students seated at a table with an architectural model and design boards; large poster labeled “Soil as a Sensor” on the wall behind them.

📸 #ET_Snapshot: Recent ET highlights - ERC “GLOW” to decode lensed GW wave-optics; AI “Deep Loop Shaping” to cut interferometer control noise; new planetarium film preview; students reimagine eco-integrated ET design. More: www.linkedin.com/feed/update/...

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.

2026 is opening with many options for early-career researchers interested in Einstein Telescope science — from workshops and international schools to training resources you can access anytime.✨
👉 Check ET page for more opportunities: shorturl.at/3wjE6
Photo: SIGRAV International School 2026

Happy Holidays!
Best wishes from the Einstein Telescope community!

Inside a long technical hall, two people walk alongside a large metallic cylindrical beam tube section; an overhead yellow crane spans the corridor.

Two people inspect a large beam tube up close as one points to a yellow lifting fixture suspended above the tube.

A wide view of the beam tube pilot area showing a yellow support frame, equipment on pallets, and long rows of pipes and cables running along the hall.

A presenter speaks at the front of a meeting room while attendees sit at desks with laptops; a large wall screen shows slides and a video call interface.

A check-in moment🤝: Einstein Telescope Organisation and CERN met to align on shared objectives for ET. From vacuum and materials to manufacturing, civil engineering and safety, CERN’s engineering expertise supports key ET activities — and opens the door to powerful synergies✨.

📢 Save the date: 21–22 Apr 2026 | CERN, Geneva — ET Vacuum & Cryogenic Industrial Workshop. Two days of technical exchange on UHV beam pipes, large components & ET-LF cryogenics. Companies welcome + flash talks.
Register: indico.cern.ch/event/160448...
#ET_tech

Two researchers working on an outdoor measurement cabinet at the Lusatia candidate site near Bautzen, surrounded by fields and winter trees.

Visitor wearing a VR headset at Space Tech Expo Europe, standing in front of an Einstein Telescope booth display reading ‘A new window on the universe.

Technician in a lab watches a large cryostat component being lifted by an overhead crane inside a clean industrial workspace.

Speaker presenting at an ET@INGV event in Rome, with Einstein Telescope Italy banners and an audience seated in a conference hall.

📸 #ET_Snapshot
So much is happening across Europe around the Einstein Telescope right now — new milestones on site studies, deep-tech innovation, and political support are landing almost daily. Full roundup here 👉https://shorturl.at/jQSyr

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.

Large cylindrical metal vacuum vessel or prototype lying horizontally on a workshop floor, clamped by several circular supports and threaded rods with bolted end caps.

Workbench in a mechanical workshop with a laptop, a red articulated coordinate-measuring arm, and a large metal ring on supports, alongside technical drawings and notes used for quality control.

Finite element eigenvalue buckling simulation of a long cylindrical tube between two supports, colored from blue to red to show total deformation values along the length.

#ET_young ✨ Meet Alexandre Lacroix, mechanical engineer at LAPP designing the 120 km ultra-high-vacuum beam tube for the Einstein Telescope. From CERN vacuum tech to spiral-reinforced tubes & rock climbing, he keeps ET both stable and adventurous!
Read more: shorturl.at/8c2AZ

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.

Group photo of the workshop participants on an outdoor terrace: about thirty people are standing and sitting in several rows, many wearing name badges on lanyards. In the background are green hills under a bright sky and a distant line of sea; a sunny day with a panoramic view.

Large group photo taken indoors at a research institute: around 35–40 conference participants of mixed genders stand and kneel in several rows, all wearing name badges and smiling at the camera. Behind them are posters on the wall and the “ikz” logo; the room has wooden floors, bright lighting, and a large potted plant by the windows on the right.

Autumn ET Collaboration workshops boosted ET tech: ET-LF TM Tower Integration (Isola d’Elba) refined the low-frequency test-mass tower, super-attenuator control, cryostat interface & baseline steps. MAD25 (Berlin) united GW, materials & industry to develop crystals for ultra-sensitive components.

🚀 GWECS Job Fair 2025!
We’re collecting job offers for the upcoming online fair connecting early-career GW scientists with employers.
Submit your openings: shorturl.at/4siMH
More details soon!

ET job opportunities: lnkd.in/d9S2-sRj

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.

🌟 Wrapped up the ET Annual Meeting in Opatija!
Four days of plenaries, sessions, collaboration, and community events come to an end. Thank you to everyone for your talks, posters, discussions, and ideas shaping the next steps of ET.
✨ Together we build the future of GW astronomy!
#ET_meeting

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.

Prof. Rajka Jurdan from the University of Rijeka speaking at the opening of the 4th Einstein Telescope Annual Meeting, with a welcome slide displayed on screen and audience members seated in front.

Participants seated in red auditorium chairs during the 4th Einstein Telescope Annual Meeting, attentively following the presentations and taking notes on laptops and tablets.

The 4th Einstein Telescope Annual Meeting has started in Opatija, hosted by the University of Rijeka. Over the next four days, participants will discuss key aspects of the ET collaboration and design — shaping the future of #gravitationalwave research.

Visitors, including children and adults, experience virtual reality headsets at an interactive Einstein Telescope exhibition, surrounded by science-themed displays. Credit: Einstein Telescope EMR

Participants attend a formal Einstein Telescope meeting in a conference room, listening to a speaker presenting slides on a large screen at the front. Credit: Einstein Telescope Italy

A group of people stand and smile during a meeting in a bright office room, with a large image of the Einstein Telescope concept on the wall behind them. Credits: Andreas Schmitter / RWTH Aachen University

📸 ET Snapshot: Highlights from this week — progress in Sardinia’s feasibility assessment, the BeamPipes4ET project, the ET Roadshow launch in Flanders, and local engagement across the EMR region.
Read more: url-shortener.me/92Z9
#EinsteinTelescope #Science #ResearchInfrastructure

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.

Einstein’s theory passes another test — and black holes reveal new secrets.
The latest LIGO-Virgo-KAGRA results uncover rare, fast-spinning mergers that may be second-generation black holes, born from earlier cosmic encounters. 💫
Image: Carl Knox, OzGrav
#EinsteinTelescope #GravitationalWaves

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.

🌍 Lusatia joins as the 3d candidate site for ET!
After the June 2025 BGR meeting, Lusatia (Saxony, 🇩🇪) has officially become a candidate location — alongside Sardinia 🇮🇹 and the Euregio Meuse-Rhine 🇧🇪🇩🇪🇳🇱.
Preparatory studies are underway, led by Christian Stegmann (DESY).
shorturl.at/HwaRq

A young woman with long brown hair sits at an outdoor café table, smiling softly at the camera.

A young woman in a gray sweater and jeans stands smiling on a platform with metal railings, in front of long arms of a scientific observatory building extending into the distance under a bright blue sky with scattered clouds.

Meet Ulyana Dupletsa, postdoc at HEPHY in Vienna 🌍
She developed key tools for ET performance studies and now helps coordinate science case analyses.
💬 “It’s inspiring to be part of a community shaping the future of gravitational-wave astronomy.”
#ET_young #ResearchInfrastructures #ET_women

A large tunnel boring machine seen head-on inside a circular underground tunnel, with workers in helmets standing nearby.

Officials wearing white safety helmets cutting a ceremonial ribbon at the inauguration of the CoMET laboratory, with a presentation screen in the background.

A group of workshop participants posing in front of the LIGO Exploration Center building under clear skies.

🚀 Big weeks for the #EinsteinTelescope community:
🔹 Cosmic Explorer – ET Beamtube Workshop (LIGO Hanford, US)
🔹 #CoMET lab launch (Rovigo, IT)
🔹 Orosei workshop on Sos Enattos site
🔹 ET EMR work on sustainability

Tech, collaboration & future-ready! ✨

#EuropeanResearchersNight lit up cities across Europe this past weekend 26th September 🌍✨
The Einstein Telescope and gravitational waves took center stage in many presentations and activities — because they’re simply that exciting! 🚀🔭
Some highlights👇

Images: Brice Maximilien; Traczyk Piotr; CERN.

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.

Researcher at CERN stands next to a shiny cylindrical beam pipe prototype, looking through its interior, which shows a series of concentric ridges.

#ET_young #ET_team
Meet Carlo Scarcia: since 2021 he’s been designing the ET beam pipe vacuum system, cutting costs with smarter materials & methods. Now leading vacuum tests at the ET pilot sector at @cern.bsky.social.
@rwth.bsky.social

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.

ETO’s 3rd General Meeting took place in Isola d’Elba 🇮🇹 — a key moment to reflect on progress, strengthen collaborations & set the course toward the #EinsteinTelescope. ETO is the organisation coordinating the design, planning & implementation of this next-gen observatory. #ETO2025

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.

🌌 Ten years ago today, gravitational waves were detected for the first time. Now, the LIGO–Virgo–KAGRA network is celebrating the anniversary with its clearest detection yet: GW250114, a black hole merger that confirmed Hawking’s Black Hole Area Theorem.
#GW10Years

Image: This plot compares the numbers and masses of black holes and neutron stars discovered by the LVK through Jan 2024, in just over eight years since the first detection, with those discovered by electromagnetic (EM) means over the last ~60 years.

Image: LIGO-Virgo-KAGRA / Aaron Geller / Northwestern