CERN
@cern.bsky.social
CERN is the European laboratory for particle physics, home to the Large Hadron Collider.
linktr.ee/CERN_official
linktr.ee/CERN_official
It is with great sadness that we learned of the passing of Antonino Zichichi.
A pioneer of CERN’s experimental programme in the 1950s and the driving force behind numerous experiments, he was one of the most influential figures in high-energy physics.
Our thoughts are with his family and friends.
A pioneer of CERN’s experimental programme in the 1950s and the driving force behind numerous experiments, he was one of the most influential figures in high-energy physics.
Our thoughts are with his family and friends.
February 9, 2026 at 4:07 PM
It is with great sadness that we learned of the passing of Antonino Zichichi.
A pioneer of CERN’s experimental programme in the 1950s and the driving force behind numerous experiments, he was one of the most influential figures in high-energy physics.
Our thoughts are with his family and friends.
A pioneer of CERN’s experimental programme in the 1950s and the driving force behind numerous experiments, he was one of the most influential figures in high-energy physics.
Our thoughts are with his family and friends.
Here we see the gold and copper coating of beam position monitors (BPMs) for the #HiLumiLHC upgrade.
Each BPM undergoes a multi-step electroplating process, beginning with a thin gold strike to ensure proper adhesion of the 100-micron-thick copper layer.
Each BPM undergoes a multi-step electroplating process, beginning with a thin gold strike to ensure proper adhesion of the 100-micron-thick copper layer.
February 9, 2026 at 7:29 AM
Here we see the gold and copper coating of beam position monitors (BPMs) for the #HiLumiLHC upgrade.
Each BPM undergoes a multi-step electroplating process, beginning with a thin gold strike to ensure proper adhesion of the 100-micron-thick copper layer.
Each BPM undergoes a multi-step electroplating process, beginning with a thin gold strike to ensure proper adhesion of the 100-micron-thick copper layer.
Today, CERN welcomed
@vdombrovskis.bsky.social, European Commissioner for Economy and Productivity, Implementation and Simplification, for a tour of the Laboratory.
@vdombrovskis.bsky.social, European Commissioner for Economy and Productivity, Implementation and Simplification, for a tour of the Laboratory.
February 6, 2026 at 3:00 PM
Today, CERN welcomed
@vdombrovskis.bsky.social, European Commissioner for Economy and Productivity, Implementation and Simplification, for a tour of the Laboratory.
@vdombrovskis.bsky.social, European Commissioner for Economy and Productivity, Implementation and Simplification, for a tour of the Laboratory.
#ThrowbackThursday to 1970 ⛄
Here we see the delivery of foggy liquid nitrogen in snowy weather. CERN's cryogenic systems cool over 1000 magnets on the Large Hadron Collider (#LHC) to temperatures close to absolute zero.
Find out more: www.home.cern/science/engi...
Here we see the delivery of foggy liquid nitrogen in snowy weather. CERN's cryogenic systems cool over 1000 magnets on the Large Hadron Collider (#LHC) to temperatures close to absolute zero.
Find out more: www.home.cern/science/engi...
February 5, 2026 at 8:00 AM
#ThrowbackThursday to 1970 ⛄
Here we see the delivery of foggy liquid nitrogen in snowy weather. CERN's cryogenic systems cool over 1000 magnets on the Large Hadron Collider (#LHC) to temperatures close to absolute zero.
Find out more: www.home.cern/science/engi...
Here we see the delivery of foggy liquid nitrogen in snowy weather. CERN's cryogenic systems cool over 1000 magnets on the Large Hadron Collider (#LHC) to temperatures close to absolute zero.
Find out more: www.home.cern/science/engi...
What does a research fellow actually do #AtCERN? 🤔
Meet Mia, a research fellow in the Systems department, contributing to ISOLDE, where scientists study the properties of atomic nuclei, with further applications in fundamental studies, astrophysics, and material and life sciences.
#WomenInScience
Meet Mia, a research fellow in the Systems department, contributing to ISOLDE, where scientists study the properties of atomic nuclei, with further applications in fundamental studies, astrophysics, and material and life sciences.
#WomenInScience
February 4, 2026 at 9:37 AM
What does a research fellow actually do #AtCERN? 🤔
Meet Mia, a research fellow in the Systems department, contributing to ISOLDE, where scientists study the properties of atomic nuclei, with further applications in fundamental studies, astrophysics, and material and life sciences.
#WomenInScience
Meet Mia, a research fellow in the Systems department, contributing to ISOLDE, where scientists study the properties of atomic nuclei, with further applications in fundamental studies, astrophysics, and material and life sciences.
#WomenInScience
Today, CERN’s #PhotoOfTheWeek features a series of images captured by Corinne Longhi during the 2025 CERN Photowalk competition. #PhysPics25
📸 by Corinne Longhi
📸 by Corinne Longhi
February 4, 2026 at 8:27 AM
Today, CERN’s #PhotoOfTheWeek features a series of images captured by Corinne Longhi during the 2025 CERN Photowalk competition. #PhysPics25
📸 by Corinne Longhi
📸 by Corinne Longhi
The Jan/Feb 2026 issue of the #CERNCourier is out 🚀
February 3, 2026 at 1:01 PM
The Jan/Feb 2026 issue of the #CERNCourier is out 🚀
Did you know CERN also welcomes biomedical engineers? 🤔
Meet Francesca, biomedical engineer and PhD student #AtCERN, who works in the robotics team of the Beams department.
#WomenInScience #WomenInScience2026 #WiS2026 #IDWGS
Meet Francesca, biomedical engineer and PhD student #AtCERN, who works in the robotics team of the Beams department.
#WomenInScience #WomenInScience2026 #WiS2026 #IDWGS
February 2, 2026 at 9:48 AM
Did you know CERN also welcomes biomedical engineers? 🤔
Meet Francesca, biomedical engineer and PhD student #AtCERN, who works in the robotics team of the Beams department.
#WomenInScience #WomenInScience2026 #WiS2026 #IDWGS
Meet Francesca, biomedical engineer and PhD student #AtCERN, who works in the robotics team of the Beams department.
#WomenInScience #WomenInScience2026 #WiS2026 #IDWGS
Here we see a team of surveyors from the European Spallation Source ERIC (ESS) taking precise measurements of a silicon carbide girder prototype at CERN.
February 2, 2026 at 8:35 AM
Here we see a team of surveyors from the European Spallation Source ERIC (ESS) taking precise measurements of a silicon carbide girder prototype at CERN.
Groundbreaking calorimeter for the #HiLumiLHC
The @cmsexperiment.bsky.social has recently completed the first prototype slice of its innovative High-Granularity Calorimeter (HGCAL), which will be the largest silicon-based detector ever built.
Read more: home.cern/news/news/ex...
The @cmsexperiment.bsky.social has recently completed the first prototype slice of its innovative High-Granularity Calorimeter (HGCAL), which will be the largest silicon-based detector ever built.
Read more: home.cern/news/news/ex...
January 30, 2026 at 9:20 AM
Groundbreaking calorimeter for the #HiLumiLHC
The @cmsexperiment.bsky.social has recently completed the first prototype slice of its innovative High-Granularity Calorimeter (HGCAL), which will be the largest silicon-based detector ever built.
Read more: home.cern/news/news/ex...
The @cmsexperiment.bsky.social has recently completed the first prototype slice of its innovative High-Granularity Calorimeter (HGCAL), which will be the largest silicon-based detector ever built.
Read more: home.cern/news/news/ex...
Heating homes with the world’s largest particle accelerator
Now operational, a new heat exchange system is reusing hot water from part of the Large Hadron Collider’s cooling system to heat homes and businesses in the local area.
Read more: home.cern/news/news/ce...
Now operational, a new heat exchange system is reusing hot water from part of the Large Hadron Collider’s cooling system to heat homes and businesses in the local area.
Read more: home.cern/news/news/ce...
January 29, 2026 at 10:14 AM
Heating homes with the world’s largest particle accelerator
Now operational, a new heat exchange system is reusing hot water from part of the Large Hadron Collider’s cooling system to heat homes and businesses in the local area.
Read more: home.cern/news/news/ce...
Now operational, a new heat exchange system is reusing hot water from part of the Large Hadron Collider’s cooling system to heat homes and businesses in the local area.
Read more: home.cern/news/news/ce...
#ThrowbackThursday to January 1963 ⛄
With stalactites of ice on roofs, white parking lots and snowy gardens, CERN’s main site in Meyrin, Switzerland turned into a true winter wonderland that year.
Are you spending this winter surrounded by snow?
With stalactites of ice on roofs, white parking lots and snowy gardens, CERN’s main site in Meyrin, Switzerland turned into a true winter wonderland that year.
Are you spending this winter surrounded by snow?
January 29, 2026 at 9:00 AM
#ThrowbackThursday to January 1963 ⛄
With stalactites of ice on roofs, white parking lots and snowy gardens, CERN’s main site in Meyrin, Switzerland turned into a true winter wonderland that year.
Are you spending this winter surrounded by snow?
With stalactites of ice on roofs, white parking lots and snowy gardens, CERN’s main site in Meyrin, Switzerland turned into a true winter wonderland that year.
Are you spending this winter surrounded by snow?
Around the Lab 💫
Today, CERN’s #PhotoOfTheWeek features a series of images captured by Gregory Milasseau during the 2025 CERN Photowalk competition. #PhysPics25
👉 Vote now and help select the global winners: www.interactions.org/photowalk-vo...
📸 by @gregseth
Today, CERN’s #PhotoOfTheWeek features a series of images captured by Gregory Milasseau during the 2025 CERN Photowalk competition. #PhysPics25
👉 Vote now and help select the global winners: www.interactions.org/photowalk-vo...
📸 by @gregseth
January 28, 2026 at 8:57 AM
Around the Lab 💫
Today, CERN’s #PhotoOfTheWeek features a series of images captured by Gregory Milasseau during the 2025 CERN Photowalk competition. #PhysPics25
👉 Vote now and help select the global winners: www.interactions.org/photowalk-vo...
📸 by @gregseth
Today, CERN’s #PhotoOfTheWeek features a series of images captured by Gregory Milasseau during the 2025 CERN Photowalk competition. #PhysPics25
👉 Vote now and help select the global winners: www.interactions.org/photowalk-vo...
📸 by @gregseth
European labs get aligned at CERN
Eleven laboratories came to CERN to measure the same object using their state-of-the-art equipment, in order to establish a common definition of alignment uncertainty in their measurements.
Eleven laboratories came to CERN to measure the same object using their state-of-the-art equipment, in order to establish a common definition of alignment uncertainty in their measurements.
January 27, 2026 at 2:00 PM
European labs get aligned at CERN
Eleven laboratories came to CERN to measure the same object using their state-of-the-art equipment, in order to establish a common definition of alignment uncertainty in their measurements.
Eleven laboratories came to CERN to measure the same object using their state-of-the-art equipment, in order to establish a common definition of alignment uncertainty in their measurements.
Last week we asked you to guess what this was… 🔎
Here we see the Experimental Linac for Surface Analysis (ELISA), a compact proton accelerator built for exhibition in #CERNScienceGateway – the only one that is ready for demonstrations to the public.
Here we see the Experimental Linac for Surface Analysis (ELISA), a compact proton accelerator built for exhibition in #CERNScienceGateway – the only one that is ready for demonstrations to the public.
January 26, 2026 at 7:09 AM
Last week we asked you to guess what this was… 🔎
Here we see the Experimental Linac for Surface Analysis (ELISA), a compact proton accelerator built for exhibition in #CERNScienceGateway – the only one that is ready for demonstrations to the public.
Here we see the Experimental Linac for Surface Analysis (ELISA), a compact proton accelerator built for exhibition in #CERNScienceGateway – the only one that is ready for demonstrations to the public.
Exploring asteroids with particle beams
CERN’s #HiRadMat facility is enabling scientists to delve into the behaviour of asteroid materials under extreme conditions.
CERN’s #HiRadMat facility is enabling scientists to delve into the behaviour of asteroid materials under extreme conditions.
January 23, 2026 at 1:18 PM
Exploring asteroids with particle beams
CERN’s #HiRadMat facility is enabling scientists to delve into the behaviour of asteroid materials under extreme conditions.
CERN’s #HiRadMat facility is enabling scientists to delve into the behaviour of asteroid materials under extreme conditions.
Can you guess what this is?
Hint: it’s located at #CERNScienceGateway.
We’ll share the answer on Monday.
Hint: it’s located at #CERNScienceGateway.
We’ll share the answer on Monday.
January 23, 2026 at 8:00 AM
Can you guess what this is?
Hint: it’s located at #CERNScienceGateway.
We’ll share the answer on Monday.
Hint: it’s located at #CERNScienceGateway.
We’ll share the answer on Monday.
#ThrowbackThursday to February 1963 🔎
Here we see CERN’s “scanning people” using the IEP apparatus to scan and measure track-chamber photographs.
From the 1960s to the 1980s, the Laboratory relied on these experts to visually inspect enormous quantities of film produced by particle detectors.
Here we see CERN’s “scanning people” using the IEP apparatus to scan and measure track-chamber photographs.
From the 1960s to the 1980s, the Laboratory relied on these experts to visually inspect enormous quantities of film produced by particle detectors.
January 22, 2026 at 8:03 AM
#ThrowbackThursday to February 1963 🔎
Here we see CERN’s “scanning people” using the IEP apparatus to scan and measure track-chamber photographs.
From the 1960s to the 1980s, the Laboratory relied on these experts to visually inspect enormous quantities of film produced by particle detectors.
Here we see CERN’s “scanning people” using the IEP apparatus to scan and measure track-chamber photographs.
From the 1960s to the 1980s, the Laboratory relied on these experts to visually inspect enormous quantities of film produced by particle detectors.
Today, CERN’s #PhotoOfTheWeek features a series of images captured by Matteo Monzali during the 2025 CERN Photowalk competition. #PhysPics25
👉 Vote now and help select the global winners: www.interactions.org/photowalk-vo...
Which picture is your favourite? 😉
👉 Vote now and help select the global winners: www.interactions.org/photowalk-vo...
Which picture is your favourite? 😉
January 21, 2026 at 10:02 AM
Today, CERN’s #PhotoOfTheWeek features a series of images captured by Matteo Monzali during the 2025 CERN Photowalk competition. #PhysPics25
👉 Vote now and help select the global winners: www.interactions.org/photowalk-vo...
Which picture is your favourite? 😉
👉 Vote now and help select the global winners: www.interactions.org/photowalk-vo...
Which picture is your favourite? 😉
What can you do with 380 million #Higgs bosons?
What is the fate of the universe? Why is there more matter than #antimatter? What lurks beyond the #StandardModel? Valentina Cairo & Steven Lowette explore the physics reach of the High-Luminosity LHC (#HiLumiLHC) in the new issue of the #CERNCourier.
What is the fate of the universe? Why is there more matter than #antimatter? What lurks beyond the #StandardModel? Valentina Cairo & Steven Lowette explore the physics reach of the High-Luminosity LHC (#HiLumiLHC) in the new issue of the #CERNCourier.
January 20, 2026 at 1:06 PM
What can you do with 380 million #Higgs bosons?
What is the fate of the universe? Why is there more matter than #antimatter? What lurks beyond the #StandardModel? Valentina Cairo & Steven Lowette explore the physics reach of the High-Luminosity LHC (#HiLumiLHC) in the new issue of the #CERNCourier.
What is the fate of the universe? Why is there more matter than #antimatter? What lurks beyond the #StandardModel? Valentina Cairo & Steven Lowette explore the physics reach of the High-Luminosity LHC (#HiLumiLHC) in the new issue of the #CERNCourier.
The CMS Barrel Timing Layer (BTL) is a crucial component of the @cmsexperiment.bsky.social detector upgrade for the #HiLumiLHC – the successor to CERN’s Large Hadron Collider.
Here we see the first tray, assembled at Peking University, which arrived at CERN in September last year.
Here we see the first tray, assembled at Peking University, which arrived at CERN in September last year.
January 19, 2026 at 8:24 AM
The CMS Barrel Timing Layer (BTL) is a crucial component of the @cmsexperiment.bsky.social detector upgrade for the #HiLumiLHC – the successor to CERN’s Large Hadron Collider.
Here we see the first tray, assembled at Peking University, which arrived at CERN in September last year.
Here we see the first tray, assembled at Peking University, which arrived at CERN in September last year.
📣 Vote for your favourite physics picture
📸 Last year, CERN opened its doors to 17 photographers and invited them to explore, through their lens, the accelerators of tomorrow.
📸 Last year, CERN opened its doors to 17 photographers and invited them to explore, through their lens, the accelerators of tomorrow.
January 16, 2026 at 11:00 AM
📣 Vote for your favourite physics picture
📸 Last year, CERN opened its doors to 17 photographers and invited them to explore, through their lens, the accelerators of tomorrow.
📸 Last year, CERN opened its doors to 17 photographers and invited them to explore, through their lens, the accelerators of tomorrow.
#ThrowbackThursday to the winter of 1977 💫
Here we see Eliane de Modzelewska with her colleagues, finalising gifts for retiring Council members, Wolfgang Gentner and Jan Hendrik Bannier.
#FunFact: the gifts were made from pieces of glass that once formed part of a bubble chamber window.
Here we see Eliane de Modzelewska with her colleagues, finalising gifts for retiring Council members, Wolfgang Gentner and Jan Hendrik Bannier.
#FunFact: the gifts were made from pieces of glass that once formed part of a bubble chamber window.
January 15, 2026 at 8:20 AM
#ThrowbackThursday to the winter of 1977 💫
Here we see Eliane de Modzelewska with her colleagues, finalising gifts for retiring Council members, Wolfgang Gentner and Jan Hendrik Bannier.
#FunFact: the gifts were made from pieces of glass that once formed part of a bubble chamber window.
Here we see Eliane de Modzelewska with her colleagues, finalising gifts for retiring Council members, Wolfgang Gentner and Jan Hendrik Bannier.
#FunFact: the gifts were made from pieces of glass that once formed part of a bubble chamber window.
Advancing cancer therapy with next-generation radionuclides
The PRISMAP programme, coordinated by CERN, has provided 159 radionuclide batches for cancer research over the past five years.
The PRISMAP programme, coordinated by CERN, has provided 159 radionuclide batches for cancer research over the past five years.
January 14, 2026 at 12:03 PM
Advancing cancer therapy with next-generation radionuclides
The PRISMAP programme, coordinated by CERN, has provided 159 radionuclide batches for cancer research over the past five years.
The PRISMAP programme, coordinated by CERN, has provided 159 radionuclide batches for cancer research over the past five years.
POV: you walk through CERN’s labs 👣
Today, CERN’s #PhotoOfTheWeek features a series of images captured by Theodore Lianopoulos during the 2025 CERN Photowalk competition, held last year. #PhysPics25
📸 by Theodore Lianopoulos
Image size has been adjusted to fit platform requirements.
Today, CERN’s #PhotoOfTheWeek features a series of images captured by Theodore Lianopoulos during the 2025 CERN Photowalk competition, held last year. #PhysPics25
📸 by Theodore Lianopoulos
Image size has been adjusted to fit platform requirements.
January 14, 2026 at 9:08 AM
POV: you walk through CERN’s labs 👣
Today, CERN’s #PhotoOfTheWeek features a series of images captured by Theodore Lianopoulos during the 2025 CERN Photowalk competition, held last year. #PhysPics25
📸 by Theodore Lianopoulos
Image size has been adjusted to fit platform requirements.
Today, CERN’s #PhotoOfTheWeek features a series of images captured by Theodore Lianopoulos during the 2025 CERN Photowalk competition, held last year. #PhysPics25
📸 by Theodore Lianopoulos
Image size has been adjusted to fit platform requirements.