Cosmology Large Angular Scale Surveyor
@classtelescope.org
Cosmology Large Angular Scale Surveyor | Measuring the Cosmic Microwave Background Polarization | Discovering when the universe first lit up | https://sites.krieger.jhu.edu/class/ | #NSFfunded
Pinned
🎉 Just published in ApJ! Our paper on the first measurement of the reionization optical depth with ground based data! 🎉 We already have twice as much data in the can, so hopefully we'll have an updated result soon! #NSFfunded iopscience.iop.org/article/10.3...
Beautiful new reflective half-wave plate being made here. The copper sheen is about a kilometer's worth of 100 µm wire. Though admittedly with the handles and the color it looks like paella 🥘!
October 14, 2025 at 1:13 PM
Beautiful new reflective half-wave plate being made here. The copper sheen is about a kilometer's worth of 100 µm wire. Though admittedly with the handles and the color it looks like paella 🥘!
🚀 Science Fair day in San Pedro de Atacama, the main local community close to the telescopes 🇨🇱🫶 The CLASS site team Deniz and Jullianna created and hosted an interactive display about the telescopes and cosmology for students and other residents! 💫
October 9, 2025 at 4:54 PM
🚀 Science Fair day in San Pedro de Atacama, the main local community close to the telescopes 🇨🇱🫶 The CLASS site team Deniz and Jullianna created and hosted an interactive display about the telescopes and cosmology for students and other residents! 💫
!!! Congratulations to Rui Shi for successfully defending her PhD thesis: "Cosmology Large Angular Scale Surveyor: From Instrumentation to Beyond the Standard Model" !!!
July 9, 2025 at 4:18 AM
!!! Congratulations to Rui Shi for successfully defending her PhD thesis: "Cosmology Large Angular Scale Surveyor: From Instrumentation to Beyond the Standard Model" !!!
🇧🇷 Brazilian CLASSmates, Jullianna and Deniz, receive an official "Motion of Applause" from the city council of their hometown for their work with CLASS and the recent results! 👏
www.instagram.com/reel/DLU5woH...
www.instagram.com/reel/DLU5woH...
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June 25, 2025 at 7:07 PM
🇧🇷 Brazilian CLASSmates, Jullianna and Deniz, receive an official "Motion of Applause" from the city council of their hometown for their work with CLASS and the recent results! 👏
www.instagram.com/reel/DLU5woH...
www.instagram.com/reel/DLU5woH...
🐝🐝🐝 The CLASS site team has been busy! 🐝🐝🐝 Here is a video of them assembling the new receiver, which comes together as nested layers. When operating, all layers are under vacuum, and outer layers thermally shield colder layers underneath. The innermost is at 0.05 Kelvin!
June 18, 2025 at 9:20 PM
🐝🐝🐝 The CLASS site team has been busy! 🐝🐝🐝 Here is a video of them assembling the new receiver, which comes together as nested layers. When operating, all layers are under vacuum, and outer layers thermally shield colder layers underneath. The innermost is at 0.05 Kelvin!
To go along our recent result on reionization, the NSF Discovery Files podcast featured the CLASS project! #NSFfunded
www.youtube.com/watch?v=uemq...
www.youtube.com/watch?v=uemq...
Seeing the Big Bang's Cosmic Background | Podcast
YouTube video by National Science Foundation News
www.youtube.com
June 16, 2025 at 7:34 PM
To go along our recent result on reionization, the NSF Discovery Files podcast featured the CLASS project! #NSFfunded
www.youtube.com/watch?v=uemq...
www.youtube.com/watch?v=uemq...
New detectors are installed on the new 90 GHz receiver at our Chile site! Go team!!
June 14, 2025 at 10:21 PM
New detectors are installed on the new 90 GHz receiver at our Chile site! Go team!!
Em português. Mais nos comentários.
www.correiobraziliense.com.br/ciencia-e-sa...
www.correiobraziliense.com.br/ciencia-e-sa...
Os segredos do amanhecer cósmico são revelados, a partir do Chile
Uma equipe de cientistas conseguiu realizar a primeira observação direta do 'amanhecer cósmico' com telescópios instalados na Terra. Medir a reionização de forma mais precisa ajuda a refinar nossa com...
www.correiobraziliense.com.br
June 14, 2025 at 4:18 PM
Em português. Mais nos comentários.
www.correiobraziliense.com.br/ciencia-e-sa...
www.correiobraziliense.com.br/ciencia-e-sa...
En español! Más en los comentarios!
www.telemundo.com/shows/amp/rc...
www.telemundo.com/shows/amp/rc...
Telescopios revelan nuevas pistas sobre las primeras estrellas tras el Big Bang
Los científicos lograron tener una imagen más clara de una de las épocas menos conocidas del universo.
www.telemundo.com
June 14, 2025 at 2:43 PM
En español! Más en los comentarios!
www.telemundo.com/shows/amp/rc...
www.telemundo.com/shows/amp/rc...
The new array of 90 GHz detector modules is assembled in Chile. Ready to go into the new telescope! #NSFfunded
June 13, 2025 at 9:15 PM
The new array of 90 GHz detector modules is assembled in Chile. Ready to go into the new telescope! #NSFfunded
'People thought this couldn't be done': Scientists observe light of 'cosmic dawn' with a telescope on Earth for the first time ever www.livescience.com/space/astron...
'People thought this couldn't be done': Scientists observe light of 'cosmic dawn' with a telescope on Earth for the first time ever
For the first time, astronomers have used a ground-based telescope to observe polarized microwave light from the universe's earliest epoch. Their observations could give them a better understanding of...
www.livescience.com
June 12, 2025 at 10:07 PM
'People thought this couldn't be done': Scientists observe light of 'cosmic dawn' with a telescope on Earth for the first time ever www.livescience.com/space/astron...
Scientists detect 13 billion-year old signal from Cosmic Dawn using Earth-based telescopes indianexpress.com/article/tech...
Scientists detect 13 billion-year old signal from ‘Cosmic Dawn’ using Earth-based telescopes
Using high-altitude telescopes in Chile, scientists have captured a faint 13-billion-year-old microwave signal from the Cosmic Dawn.
indianexpress.com
June 12, 2025 at 4:50 PM
Scientists detect 13 billion-year old signal from Cosmic Dawn using Earth-based telescopes indianexpress.com/article/tech...
Ground-based telescopes pierce cosmic dawn for first time www.courthousenews.com/ground-based...
Ground-based telescopes pierce cosmic dawn for first time
Scientists achieve breakthrough measurement of the universe's earliest epochs from Earth.
www.courthousenews.com
June 12, 2025 at 4:48 PM
Ground-based telescopes pierce cosmic dawn for first time www.courthousenews.com/ground-based...
Earth-based telescopes offer a fresh look at cosmic dawn | EurekAlert! www.eurekalert.org/news-release...
Earth-based telescopes offer a fresh look at cosmic dawn
For the first time, scientists have used Earth-based telescopes to look back in time over 13 billion years to get a clearer picture of one of the least understood epochs in the history of the universe...
www.eurekalert.org
June 12, 2025 at 4:26 AM
Earth-based telescopes offer a fresh look at cosmic dawn | EurekAlert! www.eurekalert.org/news-release...
Earth Telescopes First to See Universe’s Cosmic Dawn scienceblog.com/earth-telesc...
Earth Telescopes First to See Universe's Cosmic Dawn
Ground-based telescopes have successfully detected signals from the universe's Cosmic Dawn for the first time, measuring polarized microwave light that
scienceblog.com
June 12, 2025 at 4:20 AM
Earth Telescopes First to See Universe’s Cosmic Dawn scienceblog.com/earth-telesc...
💫 Here is a new JHU Hub article by Hannah Robbins to accompany the @aas.org ApJ publication of our first optical depth measurement! 💫 #NSFfunded
hub.jhu.edu/2025/06/11/t...
hub.jhu.edu/2025/06/11/t...
Earth-based telescopes offer a fresh look at cosmic dawn
Small telescopes in Chile are first on Earth to cut through the cosmic noise, peering back more than 13 billion years to the universe's first light
hub.jhu.edu
June 11, 2025 at 6:54 PM
💫 Here is a new JHU Hub article by Hannah Robbins to accompany the @aas.org ApJ publication of our first optical depth measurement! 💫 #NSFfunded
hub.jhu.edu/2025/06/11/t...
hub.jhu.edu/2025/06/11/t...
🎉 Just published in ApJ! Our paper on the first measurement of the reionization optical depth with ground based data! 🎉 We already have twice as much data in the can, so hopefully we'll have an updated result soon! #NSFfunded iopscience.iop.org/article/10.3...
June 11, 2025 at 5:54 PM
🎉 Just published in ApJ! Our paper on the first measurement of the reionization optical depth with ground based data! 🎉 We already have twice as much data in the can, so hopefully we'll have an updated result soon! #NSFfunded iopscience.iop.org/article/10.3...
The new 90 GHz telescope receiver has arrived at the CLASS site! 📡✨ The team pictured will now assemble and test the receiver before putting it on the telescope! #NSFfunded
June 9, 2025 at 7:31 PM
The new 90 GHz telescope receiver has arrived at the CLASS site! 📡✨ The team pictured will now assemble and test the receiver before putting it on the telescope! #NSFfunded
Good morning!
June 5, 2025 at 11:49 AM
Good morning!
Reposted by Cosmology Large Angular Scale Surveyor
New SPT-3G data release of the Euclid Deep Field-S taken in Nov-2024, with maps and source catalogs. In 57 deg^2, achieved depth of 4/4/13 uK-arcmin at 95/150/220 GHz, about 10x deeper than Planck, finding 114 dusty DSFGs and 217 galaxy clusters. @NSF arxiv.org/abs/2506.00298
June 3, 2025 at 2:01 AM
New SPT-3G data release of the Euclid Deep Field-S taken in Nov-2024, with maps and source catalogs. In 57 deg^2, achieved depth of 4/4/13 uK-arcmin at 95/150/220 GHz, about 10x deeper than Planck, finding 114 dusty DSFGs and 217 galaxy clusters. @NSF arxiv.org/abs/2506.00298
International students are crucial team members in CLASS. They play a huge role in the success of CLASS and US science/tech. www.theguardian.com/us-news/2025...
Trump administration orders US embassies to stop student visa interviews
Directive could severely delay visa processing and hurt universities that rely on foreign students for revenue
www.theguardian.com
May 28, 2025 at 3:00 AM
International students are crucial team members in CLASS. They play a huge role in the success of CLASS and US science/tech. www.theguardian.com/us-news/2025...