Event Horizon Telescope

Quick Look: NASA Telescopes Support Event Horizon Telescope in Studying Milky Way's Black Hole YouTube video by Chandra X-ray Observatory

Learn more in this video from the Chandra Observatory: www.youtube.com/watch?v=jHPW...

🔤 EHT A-Z
We’re breaking down the science behind the Event Horizon Telescope - one letter at a time.

📡 X is for X-ray Emission
Sgr A*, the supermassive black hole at our galaxy’s center, emits X-rays. Astronomers often observe X-ray flares when the emission suddenly brightens.

🔤 EHT A-Z
We’re breaking down the science behind the Event Horizon Telescope - one letter at a time.

📡 W is for Water Vapor
Our atmosphere sustains life, but water vapor absorbs the faint radio signals from black holes.

That’s why our telescopes typically sit on high, dry mountaintops.

🔤 EHT A-Z
We’re breaking down the science behind the Event Horizon Telescope - one letter at a time.

📡 V is for VLBI
VLBI stands for Very Long Baseline Interferometry.

By connecting radio telescopes around the world, we can resolve the shadow of a black hole.

🔤 EHT A-Z
We’re breaking down the science behind the Event Horizon Telescope - one letter at a time.

📡 U is for Universe
The observable universe contains trillions of galaxies, most thought to host a supermassive black hole.

Today we mark the International Day of Women and Girls in Science by acknowledging the invaluable work of the many women in the EHT - some of them highlighted in this recent conference photo.

Contributions cover all aspects needed to advance our understanding of black holes.

#WomanInSTEM

🔤EHT A–Z
We’re breaking down the science behind the Event Horizon Telescope - one letter at a time.

📡 T is for Time Variability
Signals from material around a black hole change over time.

By tracking these changes, scientists can uncover the extreme physics near black holes.

Check it out here! eventhorizontelescope.org/news/2026/01...

Previously, we could not connect the bright ring of emission in M87 with the jet seen at larger scales.

In a new study published today, a team of EHT scientists led by Saurabh found evidence of the jet base using new 2021 data that included additional telescopes.

Want to help expand black hole imaging into space?

The Black Hole Explorers (BHEX) program is now accepting applications from undergraduate students.

Be sure to apply by February 15th, 2026! www.blackholeexplorer.org/internships

Twisting Magnetic Fields Near OJ 287 | Event Horizon Telescope YouTube video by ehtelescope

Watch a new animation showing the twisting magnetic fields near the supermassive binary black hole candidate OJ 287 here! www.youtube.com/watch?si=V6l...

Read more here: eventhorizontelescope.org/news/2026/01...

A team of EHT scientists led by J.-L. Gómez, I. Cho and E. Traianou has now published striking new images of OJ 287, where the interplay between traveling shocks and instabilities in the jet plasma shows remarkable polarization patterns.

Credit: EHT Collaboration | Figure: E. Traianou

The EHT Collaboration recognizes outstanding contributions through the 6th Annual EHT Early Career & Outstanding PhD Awards.

Featured here are two 2025 Outstanding PhD Theses recipients: Dominic Chang and Aristomenis Yfantis. Congrats to all!

The EHT Collaboration recognizes outstanding contributions through the 6th Annual EHT Early Career & Outstanding PhD Awards.

Featured here are two 2025 Outstanding PhD Theses recipients: Marianna Foschi and Rohan Dahale. Congrats to all!

EHT Deputy Project Scientist Dr. Kazunori Akiyama (@kazuakiyama.bsky.social‬) has received a £4M Faraday Discovery Fellowship. The project, TomoGrav, will deliver the first dynamic 3D views of plasma around black holes.

Read more: eventhorizontelescope.org/news/2025/12...

The EHT Collaboration recognizes outstanding contributions through the 6th Annual EHT Early Career & Outstanding PhD Awards.

Featured here are two 2025 Early Career Research & Leadership Award recipients: Hendrik Müller and León Sosapanta Salas. Congrats to all!

The EHT Collaboration recognizes outstanding contributions through the 6th Annual EHT Early Career & Outstanding PhD Awards.

Featured here are two 2025 Early Career Research & Leadership Award recipients: Koushik Chatterjee and Britton Jeter. Congrats to all!

The EHT Collaboration recognizes outstanding contributions through the 6th Annual EHT Early Career & Outstanding PhD Awards.

Featured here are two 2025 Early Career Research & Leadership Award recipients: Rohan Dahale and Sasha Plavin. Congrats to all!

The EHT Collaboration recognizes outstanding contributions through the 6th Annual EHT Early Career & Outstanding PhD Awards.

Featured here are three 2025 Early Career Research & Leadership Award recipients: Iniyan Natarajan, Paul Tiede, and Efthalia Traianou. Congrats to all!

UPDATE: the deadline to apply is now February 1st, 2026.

EHT scientists have gathered in the virtual world this week for their 3-day winter collaboration meeting.

They discussed both new results and future directions of the EHT.

Stay tuned, because some amazing results are going to be announced soon!

#EHT2025 #EventHorizonTelescope

🔤 EHT A–Z
We’re breaking down the science behind the Event Horizon Telescope - one letter at a time.

📡S is for Singularity
In theory, all the mass of a black hole should be concentrated in a single point, hidden within the event horizon. That is why we can’t observe it.

🔤 EHT A–Z
We’re breaking down the science behind the Event Horizon Telescope - one letter at a time.

📡R is for Resolution
Any instrument that sees light is defined by its resolution - the smallest scale one can distinguish.

With the EHT you could see a coin on the moon!

🔤 EHT A–Z
We’re breaking down the science behind the Event Horizon Telescope - one letter at a time.

📡Q is for Quasar
Once seen as star-like radio sources, spectra showed quasars are distant, ultra-bright galactic cores.

The EHT studies quasars, too!
eventhorizontelescope.org/blog/peering...

The NSBP/SAO EHT Scholars Program is now accepting applications for Summer 2026!

Apply by Dec. 15th by contacting nsbp-sao-eht@cfa.harvard.edu

🔤 EHT A–Z
We’re breaking down the science behind the Event Horizon Telescope - one letter at a time.

📡 P is for Polarization
Light’s fields oscillate, and their orientation sets its polarization - a key clue to a black hole’s environment.

Learn more: www.youtube.com/watch?v=smZt...

🔤EHT A–Z
We’re breaking down the science behind the Event Horizon Telescope - one letter at a time.

📡O is for Observing Campaign
Every year, the EHT studies M87*, Sgr A*, and other targets to watch black holes evolve - and to keep improving our images.

🔤EHT A–Z
We’re breaking down the science behind the Event Horizon Telescope - one letter at a time.

📡 N is for Noise
Every measurement is affected by it. Noise comes from our instruments, Earth’s atmosphere, and even gas and dust between us and what we're observing.

#EHTAZ #blackholes #space

Great news! Prof. Mareki Honma, Director of NAOJ Mizusawa VLBI Observatory and long-standing member of the EHT, has been awarded the 2025 Nishina Memorial Prize. The award recognizes his achievements in contributions to imaging the shadow of supermassive black holes.