Connor Barker
@connorbarker.bsky.social
Research Fellow in Atmospheric Chemistry at UCL.
Coding in Python and GEOS-Chem to study atmospheric pollution. PhD at Royal Holloway. MChem at University of Manchester.
Coding in Python and GEOS-Chem to study atmospheric pollution. PhD at Royal Holloway. MChem at University of Manchester.
Pinned
Space Emissions Tracker
A tracker of rocket launch and re-entry emissions based on Barker, C.R., Marais, E.A. & McDowell, J.C. Global 3D rocket launch and re-entry air pollutant and CO2 emissions at the onset of the megacons...
orbitalemissions.org
⭐ I'm excited to announce the latest version (v2.6.0) of my open-source space industry emissions portal, developed @uclgeography.bsky.social!
🚀🛰️ Follow the link to visualise, filter, and download rocket launch and re-entry emissions across the space age!
orbitalemissions.org
🚀🛰️ Follow the link to visualise, filter, and download rocket launch and re-entry emissions across the space age!
orbitalemissions.org
Reposted by Connor Barker
Under the last government, the UK borrowed more than the G7 average in every one of their 14 years. This year? The UK will borrow less.
For this week’s edition of Charting the Course - how Labour is getting the UK’s fiscal house in order.
torstenbell.substack.com/p/fiscal-fac...
For this week’s edition of Charting the Course - how Labour is getting the UK’s fiscal house in order.
torstenbell.substack.com/p/fiscal-fac...
Fiscal Fact (and Fiction)
Under the Tories, the UK borrowed more than the G7 average in every one of their 14 years. This year, the UK will borrow less. Here's how we're putting the UK's fiscal house in order.
torstenbell.substack.com
September 8, 2026 at 9:38 AM
Under the last government, the UK borrowed more than the G7 average in every one of their 14 years. This year? The UK will borrow less.
For this week’s edition of Charting the Course - how Labour is getting the UK’s fiscal house in order.
torstenbell.substack.com/p/fiscal-fac...
For this week’s edition of Charting the Course - how Labour is getting the UK’s fiscal house in order.
torstenbell.substack.com/p/fiscal-fac...
Reposted by Connor Barker
me: [sobbing] England, you can't just call everything a pudding
J. J. Thomson: [points at atom] pudding
J. J. Thomson: [points at atom] pudding
July 30, 2026 at 4:54 PM
me: [sobbing] England, you can't just call everything a pudding
J. J. Thomson: [points at atom] pudding
J. J. Thomson: [points at atom] pudding
Reposted by Connor Barker
The Argentinian player that scored the 1st goal against England, is the same one that uploaded a social media video of himself singing racist and transphobic songs about Black French players.
The transphobia was included to insult Kylian Mbappé, and to isolate trans people from public life.
The transphobia was included to insult Kylian Mbappé, and to isolate trans people from public life.
July 16, 2026 at 8:24 AM
The Argentinian player that scored the 1st goal against England, is the same one that uploaded a social media video of himself singing racist and transphobic songs about Black French players.
The transphobia was included to insult Kylian Mbappé, and to isolate trans people from public life.
The transphobia was included to insult Kylian Mbappé, and to isolate trans people from public life.
Reposted by Connor Barker
Lots of people commenting on how unsporting Argentina’s players are, but let’s be fair and remember that they are also very racist.
French federation files complaint over ‘racist’ song by Argentina players
The French soccer federation pledged to file a complaint with Fifa over ‘racist and discriminatory remarks’ by Argentina players after their Copa América final win
www.theguardian.com
July 15, 2026 at 7:41 PM
Lots of people commenting on how unsporting Argentina’s players are, but let’s be fair and remember that they are also very racist.
⭐ I'm excited to announce the latest version (v2.6.0) of my open-source space industry emissions portal, developed @uclgeography.bsky.social!
🚀🛰️ Follow the link to visualise, filter, and download rocket launch and re-entry emissions across the space age!
orbitalemissions.org
🚀🛰️ Follow the link to visualise, filter, and download rocket launch and re-entry emissions across the space age!
orbitalemissions.org
Space Emissions Tracker
A tracker of rocket launch and re-entry emissions based on Barker, C.R., Marais, E.A. & McDowell, J.C. Global 3D rocket launch and re-entry air pollutant and CO2 emissions at the onset of the megacons...
orbitalemissions.org
June 9, 2026 at 5:27 PM
⭐ I'm excited to announce the latest version (v2.6.0) of my open-source space industry emissions portal, developed @uclgeography.bsky.social!
🚀🛰️ Follow the link to visualise, filter, and download rocket launch and re-entry emissions across the space age!
orbitalemissions.org
🚀🛰️ Follow the link to visualise, filter, and download rocket launch and re-entry emissions across the space age!
orbitalemissions.org
Reposted by Connor Barker
Can satellites track rocket pollution? 🚀🛰️
New @ucl.ac.uk Geography research led by Professor Eloise Marais is using high-resolution satellite imaging to detect spacecraft emissions and understand their impact on air quality and climate.
#EarthObservation #ClimateScience #RemoteSensing
New @ucl.ac.uk Geography research led by Professor Eloise Marais is using high-resolution satellite imaging to detect spacecraft emissions and understand their impact on air quality and climate.
#EarthObservation #ClimateScience #RemoteSensing
Unlocking the potential to quantify spacecraft pollution from space-based broadband imagers
Researchers at UCL Geography are using satellite imaging to track rocket pollution plumes and better understand the atmospheric impact of growing space launch emissions.
tinyurl.com
June 3, 2026 at 12:48 PM
Can satellites track rocket pollution? 🚀🛰️
New @ucl.ac.uk Geography research led by Professor Eloise Marais is using high-resolution satellite imaging to detect spacecraft emissions and understand their impact on air quality and climate.
#EarthObservation #ClimateScience #RemoteSensing
New @ucl.ac.uk Geography research led by Professor Eloise Marais is using high-resolution satellite imaging to detect spacecraft emissions and understand their impact on air quality and climate.
#EarthObservation #ClimateScience #RemoteSensing
Reposted by Connor Barker
Rocket launches and burning satellites may be creating an “accidental geoengineering experiment”, according to new research discussed by Professor Eloise Marais on @npr.org. Listen now: tinyurl.com/geoengin
#ClimateScience #Geoengineering #SpaceResearch @ucl.ac.uk
#ClimateScience #Geoengineering #SpaceResearch @ucl.ac.uk
tinyurl.com
May 19, 2026 at 8:02 AM
Rocket launches and burning satellites may be creating an “accidental geoengineering experiment”, according to new research discussed by Professor Eloise Marais on @npr.org. Listen now: tinyurl.com/geoengin
#ClimateScience #Geoengineering #SpaceResearch @ucl.ac.uk
#ClimateScience #Geoengineering #SpaceResearch @ucl.ac.uk
Reposted by Connor Barker
Artemis 2 was the furthest human voyage from Earth. Per the final JPL Horizons trajectory I estimate the max distance from the geocenter was 413145 km at 2304 UTC Apr 6 (about 4 km less and 1 min later than PAO's report at the time). (1 / n ).....
April 13, 2026 at 12:01 PM
Artemis 2 was the furthest human voyage from Earth. Per the final JPL Horizons trajectory I estimate the max distance from the geocenter was 413145 km at 2304 UTC Apr 6 (about 4 km less and 1 min later than PAO's report at the time). (1 / n ).....
Reposted by Connor Barker
I would like to vote for a party that said: "we keep being buffeted by forces outside our control. This is because we've allowed our capabilities to degrade. We're going to build them up again so some moron can't just bankrupt us with a stupid idea. It will take a while but here's the plan".
March 9, 2026 at 10:11 AM
I would like to vote for a party that said: "we keep being buffeted by forces outside our control. This is because we've allowed our capabilities to degrade. We're going to build them up again so some moron can't just bankrupt us with a stupid idea. It will take a while but here's the plan".
Reposted by Connor Barker
Cutting air pollution should form part of government strategies to reduce cancer rates
My latest piece for @theguardian.com
www.theguardian.com/environment/...
My latest piece for @theguardian.com
www.theguardian.com/environment/...
Tackling air pollution should be part of government work to cut cancer rates, scientists say
New European Code Against Cancer calls on politicians to phase out use of fossil fuels in homes
www.theguardian.com
March 6, 2026 at 8:10 AM
Cutting air pollution should form part of government strategies to reduce cancer rates
My latest piece for @theguardian.com
www.theguardian.com/environment/...
My latest piece for @theguardian.com
www.theguardian.com/environment/...
Reposted by Connor Barker
"What happens if the minimum lethal amount of debris from each satellite does not burn up and reaches the ground intact?"
You don't want to know the answer.
You don't want to know the answer.
Satellite megaconstellations continue to grow. Could their debris fall on us?
"What happens if the minimum lethal amount of debris from each satellite does not burn up and reaches the ground intact?"
www.space.com
February 13, 2026 at 2:41 PM
"What happens if the minimum lethal amount of debris from each satellite does not burn up and reaches the ground intact?"
You don't want to know the answer.
You don't want to know the answer.
🛰️ 🚀 I'm excited to share our updated online tracker of rocket launch and spacecraft re-entry emissions for the entire space age! cbarker211.github.io
🌍 Space industry emissions are rapidly increasing, harming our ozone layer and affecting our climate. #space #rocket #launch #atmosphere #environment
🌍 Space industry emissions are rapidly increasing, harming our ozone layer and affecting our climate. #space #rocket #launch #atmosphere #environment
January 6, 2026 at 3:04 PM
🛰️ 🚀 I'm excited to share our updated online tracker of rocket launch and spacecraft re-entry emissions for the entire space age! cbarker211.github.io
🌍 Space industry emissions are rapidly increasing, harming our ozone layer and affecting our climate. #space #rocket #launch #atmosphere #environment
🌍 Space industry emissions are rapidly increasing, harming our ozone layer and affecting our climate. #space #rocket #launch #atmosphere #environment
Reposted by Connor Barker
🚀🌍 Professor Eloise Marais joined 18 international experts in contributing to a new @unep.org Issues Note on safeguarding the space environment.
Her work highlights risks to the ozone layer & climate from spacecraft pollution.
#UCLGeography #UNEP #SpaceSustainability #AtmosphericScience @ucl.ac.uk
Her work highlights risks to the ozone layer & climate from spacecraft pollution.
#UCLGeography #UNEP #SpaceSustainability #AtmosphericScience @ucl.ac.uk
Safeguarding Space: Environmental issues, risks and responsibilities
The space sector is growing exponentially, with over 12,000 spacecraft deployed in the past decade and many more planned as the world embraces the benefits provided by satellite services. This growth ...
www.unep.org
January 6, 2026 at 9:51 AM
🚀🌍 Professor Eloise Marais joined 18 international experts in contributing to a new @unep.org Issues Note on safeguarding the space environment.
Her work highlights risks to the ozone layer & climate from spacecraft pollution.
#UCLGeography #UNEP #SpaceSustainability #AtmosphericScience @ucl.ac.uk
Her work highlights risks to the ozone layer & climate from spacecraft pollution.
#UCLGeography #UNEP #SpaceSustainability #AtmosphericScience @ucl.ac.uk
Reposted by Connor Barker
I'd like to know who ever thought it was a good idea to put Methods after everything else in the paper. I just want to talk.
December 15, 2025 at 5:50 PM
I'd like to know who ever thought it was a good idea to put Methods after everything else in the paper. I just want to talk.
Reposted by Connor Barker
“More pollutants are being released ... from rockets and satellites than ever before.
We’re in uncharted territory, as humans have never added this much pollution to the upper layers of the atmosphere."
- Prof Eloise Marais @ucl.ac.uk
Piece by me
www.theguardian.com/environment/...
We’re in uncharted territory, as humans have never added this much pollution to the upper layers of the atmosphere."
- Prof Eloise Marais @ucl.ac.uk
Piece by me
www.theguardian.com/environment/...
Scientists call for action to address air pollution from space launches
Satellite mega-constellation missions behind threefold increase in emissions of climate-altering soot and CO2
www.theguardian.com
August 22, 2025 at 7:22 AM
“More pollutants are being released ... from rockets and satellites than ever before.
We’re in uncharted territory, as humans have never added this much pollution to the upper layers of the atmosphere."
- Prof Eloise Marais @ucl.ac.uk
Piece by me
www.theguardian.com/environment/...
We’re in uncharted territory, as humans have never added this much pollution to the upper layers of the atmosphere."
- Prof Eloise Marais @ucl.ac.uk
Piece by me
www.theguardian.com/environment/...
Reposted by Connor Barker
assassinations, handcuffing a senator at press conference, marines detaining a civilian, and a military parade for the president’s birthday. rough week for democracy.
Governor Waltz has now confirmed that Hortman and her husband were killed in the attack.
June 14, 2025 at 3:14 PM
assassinations, handcuffing a senator at press conference, marines detaining a civilian, and a military parade for the president’s birthday. rough week for democracy.
Reposted by Connor Barker
Today they have crossed a deep red line.
We, the people, must hold the president and his appointees accountable for this outrageous abuse against American liberty.
We, the people, must hold the president and his appointees accountable for this outrageous abuse against American liberty.
June 12, 2025 at 8:05 PM
Today they have crossed a deep red line.
We, the people, must hold the president and his appointees accountable for this outrageous abuse against American liberty.
We, the people, must hold the president and his appointees accountable for this outrageous abuse against American liberty.
Reposted by Connor Barker
🚨 Professor Eloise Marais warns of the long-term damage from US climate science cuts:
🛰️ “It won’t simply be a 4-year pause. It will take much longer than that to rebuild what Trump is destroying.”
#ClimateScience #SpacePollution #UCLGeography #AtmosphericChemistry #EnvironmentalJustice
🛰️ “It won’t simply be a 4-year pause. It will take much longer than that to rebuild what Trump is destroying.”
#ClimateScience #SpacePollution #UCLGeography #AtmosphericChemistry #EnvironmentalJustice
Scientists worry Trump's budget cuts will halt satellite air pollution studies: 'It's incredibly short-sighted'
"The re-entries are really rising quickly. If we stop measuring what is happening in the atmosphere right now, we could be way beyond the point where we can stop the damage that's being done."
tinyurl.com
May 29, 2025 at 9:26 AM
🚨 Professor Eloise Marais warns of the long-term damage from US climate science cuts:
🛰️ “It won’t simply be a 4-year pause. It will take much longer than that to rebuild what Trump is destroying.”
#ClimateScience #SpacePollution #UCLGeography #AtmosphericChemistry #EnvironmentalJustice
🛰️ “It won’t simply be a 4-year pause. It will take much longer than that to rebuild what Trump is destroying.”
#ClimateScience #SpacePollution #UCLGeography #AtmosphericChemistry #EnvironmentalJustice
I'm at #EGU2025 this week, presenting a poster on my research into the environmental impacts of satellite megaconstellations.
I'll be at X5.77 on Friday from 10:45-12:30, please come by if you are also in Vienna!
meetingorganizer.copernicus.org/EGU25/EGU25-...
I'll be at X5.77 on Friday from 10:45-12:30, please come by if you are also in Vienna!
meetingorganizer.copernicus.org/EGU25/EGU25-...
Session AS3.9
meetingorganizer.copernicus.org
April 28, 2025 at 10:03 AM
I'm at #EGU2025 this week, presenting a poster on my research into the environmental impacts of satellite megaconstellations.
I'll be at X5.77 on Friday from 10:45-12:30, please come by if you are also in Vienna!
meetingorganizer.copernicus.org/EGU25/EGU25-...
I'll be at X5.77 on Friday from 10:45-12:30, please come by if you are also in Vienna!
meetingorganizer.copernicus.org/EGU25/EGU25-...
Please join us at 3pm UTC to hear about the latest atmospheric chemistry research by early career researchers!
📢 Join the next IGAC-iCACGP Early Career Seminar!
🗓️ March 25th, 3-4 PM (UTC)
🎤 Speakers:
🔸 Mahendar Chand Rajwar (ARIES, India)
🔸 Connor Barker (UCL, UK)
🔗 Register now: bit.ly/ECR-Seminar3
#AtmosChem #ECR #ScienceSeminar
🗓️ March 25th, 3-4 PM (UTC)
🎤 Speakers:
🔸 Mahendar Chand Rajwar (ARIES, India)
🔸 Connor Barker (UCL, UK)
🔗 Register now: bit.ly/ECR-Seminar3
#AtmosChem #ECR #ScienceSeminar
March 25, 2025 at 10:38 AM
Please join us at 3pm UTC to hear about the latest atmospheric chemistry research by early career researchers!
Interested in how different rockets pollute the atmosphere?
We’ve added more search functionality and explanatory information to our rocket launch emissions tracker. Check it out: maraisresearchgroup.co.uk/launch_emis....
We’ve added more search functionality and explanatory information to our rocket launch emissions tracker. Check it out: maraisresearchgroup.co.uk/launch_emis....
Rocket Launch EmissionsAtmospheric Composition and Air Quality Group
maraisresearchgroup.co.uk
March 24, 2025 at 10:08 AM
Interested in how different rockets pollute the atmosphere?
We’ve added more search functionality and explanatory information to our rocket launch emissions tracker. Check it out: maraisresearchgroup.co.uk/launch_emis....
We’ve added more search functionality and explanatory information to our rocket launch emissions tracker. Check it out: maraisresearchgroup.co.uk/launch_emis....
Reposted by Connor Barker
🛰️ What happens when satellites burn up in Earth’s atmosphere?
A new study led by Professor Eloise Marais examines how satellite megaconstellations add to atmospheric emissions.
🔗 Read more in @nature.com
#UCLGeography #SpaceSustainability #EnvironmentalScience #SatelliteImpact
A new study led by Professor Eloise Marais examines how satellite megaconstellations add to atmospheric emissions.
🔗 Read more in @nature.com
#UCLGeography #SpaceSustainability #EnvironmentalScience #SatelliteImpact
Swarms of satellites are harming astronomy. Here’s how researchers are fighting back
SpaceX and other companies plan to launch tens of thousands of satellites, which could mar astronomical observations and pollute the atmosphere.
tinyurl.com
March 19, 2025 at 9:42 AM
🛰️ What happens when satellites burn up in Earth’s atmosphere?
A new study led by Professor Eloise Marais examines how satellite megaconstellations add to atmospheric emissions.
🔗 Read more in @nature.com
#UCLGeography #SpaceSustainability #EnvironmentalScience #SatelliteImpact
A new study led by Professor Eloise Marais examines how satellite megaconstellations add to atmospheric emissions.
🔗 Read more in @nature.com
#UCLGeography #SpaceSustainability #EnvironmentalScience #SatelliteImpact
It was great to speak to Nature about the growing problem of atmospheric pollution by satellite megaconstellations.
Satellites play a crucial part in connecting people, including bringing Internet to remote communities and emergency responders. But the rising number can be a problem for scientists.
https://go.nature.com/4hAQJJr
https://go.nature.com/4hAQJJr
Swarms of satellites are harming astronomy. Here’s how researchers are fighting back
SpaceX and other companies plan to launch tens of thousands of satellites, which could mar astronomical observations and pollute the atmosphere.
go.nature.com
March 18, 2025 at 5:11 PM
It was great to speak to Nature about the growing problem of atmospheric pollution by satellite megaconstellations.
Reposted by Connor Barker
📢 Join the next IGAC-iCACGP Early Career Seminar!
🗓️ March 25th, 3-4 PM (UTC)
🎤 Speakers:
🔸 Mahendar Chand Rajwar (ARIES, India)
🔸 Connor Barker (UCL, UK)
🔗 Register now: bit.ly/ECR-Seminar3
#AtmosChem #ECR #ScienceSeminar
🗓️ March 25th, 3-4 PM (UTC)
🎤 Speakers:
🔸 Mahendar Chand Rajwar (ARIES, India)
🔸 Connor Barker (UCL, UK)
🔗 Register now: bit.ly/ECR-Seminar3
#AtmosChem #ECR #ScienceSeminar
March 17, 2025 at 1:52 PM
📢 Join the next IGAC-iCACGP Early Career Seminar!
🗓️ March 25th, 3-4 PM (UTC)
🎤 Speakers:
🔸 Mahendar Chand Rajwar (ARIES, India)
🔸 Connor Barker (UCL, UK)
🔗 Register now: bit.ly/ECR-Seminar3
#AtmosChem #ECR #ScienceSeminar
🗓️ March 25th, 3-4 PM (UTC)
🎤 Speakers:
🔸 Mahendar Chand Rajwar (ARIES, India)
🔸 Connor Barker (UCL, UK)
🔗 Register now: bit.ly/ECR-Seminar3
#AtmosChem #ECR #ScienceSeminar