Christos Doudoulakis, PhD
@csath.bsky.social
PhD in High Energy Physics - Freelance Writer (Physics, Maths, Pop. Sci.) - Stormchaser - Founding Member of the Greek team of TLE chasers - Photographer - Teacher / https://doudoulakis.blogspot.com/
Pinned
Our #paper about the first-ever observations of upper #atmospheric #lightning (#TLEs or Transient Luminous Events, e.g. “red #sprites”) from Greece: Doudoulakis, C.; Papathanasiou, T.; Sagiakos, D.; Tsouras, P. www.mdpi.com/2673-4931/26... Our findings were presented in #COMECAP2023
Reposted by Christos Doudoulakis, PhD
🚨 NASA scientists warn: critical equipment at Goddard Space Flight Center could be discarded during the shutdown, jeopardizing decades of Earth & space science missions.
📢 Act now: agu.quorum.us/campaign/146...
#sciencepolicy #saveNASA
📢 Act now: agu.quorum.us/campaign/146...
#sciencepolicy #saveNASA
November 7, 2025 at 12:45 AM
🚨 NASA scientists warn: critical equipment at Goddard Space Flight Center could be discarded during the shutdown, jeopardizing decades of Earth & space science missions.
📢 Act now: agu.quorum.us/campaign/146...
#sciencepolicy #saveNASA
📢 Act now: agu.quorum.us/campaign/146...
#sciencepolicy #saveNASA
November 5, 2025 at 1:29 PM
Tonight (27-28 Oct.), #TLE party with red #sprites over #thunderstorms at the Aegean Sea and W Turkey. This is just a taste from an 8 hour session. #StormHour @stormhour.com
October 28, 2025 at 4:38 AM
Tonight (27-28 Oct.), #TLE party with red #sprites over #thunderstorms at the Aegean Sea and W Turkey. This is just a taste from an 8 hour session. #StormHour @stormhour.com
This is great! 🤩
The outskirts of Munich have Bortle level 4-5 skies (based on this lightpollutionmap.app), which is nice (considering the fact that I tried from downtown Athens with level 9 😅)
The outskirts of Munich have Bortle level 4-5 skies (based on this lightpollutionmap.app), which is nice (considering the fact that I tried from downtown Athens with level 9 😅)
#Comet C/2025 A6 #Lemmon in the constellation Boötes, on the evening of October 24th. Captured from the light polluted outskirts of Munich.
16 minutes integration time with my Fujifilm X-S10 and 135mm f4.5 lens (untracked).
#astrophotography 🔭
16 minutes integration time with my Fujifilm X-S10 and 135mm f4.5 lens (untracked).
#astrophotography 🔭
October 27, 2025 at 10:09 AM
This is great! 🤩
The outskirts of Munich have Bortle level 4-5 skies (based on this lightpollutionmap.app), which is nice (considering the fact that I tried from downtown Athens with level 9 😅)
The outskirts of Munich have Bortle level 4-5 skies (based on this lightpollutionmap.app), which is nice (considering the fact that I tried from downtown Athens with level 9 😅)
October 27, 2025 at 1:19 AM
Dusk-to-dawn 24-25.10.2025. Cape #Sounion. Lots of clouds still for the comet though. It's the 3rd consecutive week (yes, the thing that carries 7 days with it) that it's not possible to shoot it. Tell me about "sunny Greece" blah blah blah... 🤪 I just want 1 (one) clear night.
October 26, 2025 at 12:44 AM
Dusk-to-dawn 24-25.10.2025. Cape #Sounion. Lots of clouds still for the comet though. It's the 3rd consecutive week (yes, the thing that carries 7 days with it) that it's not possible to shoot it. Tell me about "sunny Greece" blah blah blah... 🤪 I just want 1 (one) clear night.
#Thunderstorm and some #lightning captures just south of cape Sounion, S. Attica, Greece, last night (Oct. 20). #StormHour @stormhour.com
October 21, 2025 at 4:30 PM
#Thunderstorm and some #lightning captures just south of cape Sounion, S. Attica, Greece, last night (Oct. 20). #StormHour @stormhour.com
Beautiful Taurid fireball at 0:29'' with a persistent smoke train (screenshot at the comments below). Taurids will be a nice show to watch for the next 2 weeks, esp. this "swarm" year, as it was in 2022 and 2015, since they will have an increased number of fireballs relative to their "average" years
24H 4K All Sky Timelapse, Maunakea, Hawaii
As of 2025/10/20
Credit: NAOJ
As of 2025/10/20
Credit: NAOJ
Nagarehoshiko channel
YouTube
www.youtube.com
October 21, 2025 at 8:11 AM
Beautiful Taurid fireball at 0:29'' with a persistent smoke train (screenshot at the comments below). Taurids will be a nice show to watch for the next 2 weeks, esp. this "swarm" year, as it was in 2022 and 2015, since they will have an increased number of fireballs relative to their "average" years
Beautiful shot of a 22 deg. solar halo with a circumhorizontal arc below it 🤩
🌈Tejina/Tenerife/Canary Islands/Spain. Under the sundog.🌈
I took this amazing pic some years ago.
©️May Naomi Photography
@cazatormentas.bsky.social
@photohour.bsky.social
#stormhour
#landscapes
#meteophoto
#photography
#nature
#Tenerife
#CanaryIslands
#Spain
I took this amazing pic some years ago.
©️May Naomi Photography
@cazatormentas.bsky.social
@photohour.bsky.social
#stormhour
#landscapes
#meteophoto
#photography
#nature
#Tenerife
#CanaryIslands
#Spain
October 15, 2025 at 6:12 AM
Beautiful shot of a 22 deg. solar halo with a circumhorizontal arc below it 🤩
I desperately want whatever they are smoking
Most people are fairly optimistic that their lives will improve
October 13, 2025 at 10:37 AM
I desperately want whatever they are smoking
Impressive capture of (anti)crepuscular rays from plane 🤩 Shadow bands created when sunlight encounters obstacles (e.g. clouds). These bands converge to the anti-solar point.
October 11, 2025 at 9:41 AM
Impressive capture of (anti)crepuscular rays from plane 🤩 Shadow bands created when sunlight encounters obstacles (e.g. clouds). These bands converge to the anti-solar point.
Red Sprites over the thunderstorms at Kefalonia isl. this early morning.Also a (Draconid) green meteor photobomb 😅 I had (almost) full moon in front of me (out of the frame, to the upper left). Red color is due to light pollution filter system I use. Our paper on TLEs: www.mdpi.com/2673-4931/26...
October 6, 2025 at 12:41 PM
Red Sprites over the thunderstorms at Kefalonia isl. this early morning.Also a (Draconid) green meteor photobomb 😅 I had (almost) full moon in front of me (out of the frame, to the upper left). Red color is due to light pollution filter system I use. Our paper on TLEs: www.mdpi.com/2673-4931/26...
Our interstellar visitor, comet 3I/Atlas, as seen from Mars! 🤩
I think Perseverance may have spotted interstellar comet 3I/Atlas last night from Mars!
After stacking 20 images from Mastcam-Z, I found a faint smudge of light in the constellation Corona Borealis close to the location where the comet was expected. 🔭
Credit: NASA/JPL-Caltech/ASU/Simeon Schmauß
After stacking 20 images from Mastcam-Z, I found a faint smudge of light in the constellation Corona Borealis close to the location where the comet was expected. 🔭
Credit: NASA/JPL-Caltech/ASU/Simeon Schmauß
October 4, 2025 at 8:49 AM
Our interstellar visitor, comet 3I/Atlas, as seen from Mars! 🤩
October 3, 2025 at 11:57 AM
Some moments from the total #lunar #eclipse on the 7th of Sep. 2025, from #Athens #Greece. Blue ozone band just before totality, long exposure with star and eclipsed #red #moon trails and bonus: anti-crepuscular rays converging on the antisolar point (anthelion), just before #moonrise.
September 9, 2025 at 9:55 AM
Jaw dropping difference...
The caves dug by Henry Russell at Cerbillona (3205 m asl) near top of Vignemale (3298 m) were easily accessible from Ossoue Glacier at that time...
...but not anymore! 😲🧊🔥
(and only since the mid 2010s!)
📷 Via Guillaume Beloscar
...but not anymore! 😲🧊🔥
(and only since the mid 2010s!)
📷 Via Guillaume Beloscar
September 1, 2025 at 7:23 AM
Jaw dropping difference...
#Red #Sprites tonight, over the severe #thunderstorms at NW. #Greece as seen from #Athens. (Red sprites are rare cold plasma electrical discharges occuring over thunderstorms under conditions).
PS. You can always check our paper about observations of #TLEs from Greece: www.mdpi.com/2673-4931/26...
PS. You can always check our paper about observations of #TLEs from Greece: www.mdpi.com/2673-4931/26...
August 31, 2025 at 12:34 AM
#Red #Sprites tonight, over the severe #thunderstorms at NW. #Greece as seen from #Athens. (Red sprites are rare cold plasma electrical discharges occuring over thunderstorms under conditions).
PS. You can always check our paper about observations of #TLEs from Greece: www.mdpi.com/2673-4931/26...
PS. You can always check our paper about observations of #TLEs from Greece: www.mdpi.com/2673-4931/26...
"Today, only idi0ts carry out dictatorships using tanks", oh wait...
This is a real photograph of Washington, DC this week, where the United States president has ordered military occupation in peacetime, and ordered the display of colossal portraits of himself.
www.wsj.com/politics/pol...
www.wsj.com/politics/pol...
August 29, 2025 at 6:41 AM
"Today, only idi0ts carry out dictatorships using tanks", oh wait...
At first, I thought it was AI. Then, I wished it was.
IMO many Americans don't even buy guns for personal protection or to defend themselves against a tyrannical government. They simply have a shopping addiction
August 28, 2025 at 5:54 AM
At first, I thought it was AI. Then, I wished it was.
It's difficult to write a serious and well-balanced article about wildfires (or any major matter going on) in GR. But here is one! Great work @jessimckenzi.bsky.social !
A few assorted observations from my latest story about wildfires in Greece: thebulletin.org/2025/08/a-pe...
A perfect firestorm: The social, political, and climate forces that keep Athens burning
Athens and its suburbs have lost 37 percent of its forests and grasslands to wildfire since 2017. What will it take to keep the city from burning?
thebulletin.org
August 19, 2025 at 12:38 PM
It's difficult to write a serious and well-balanced article about wildfires (or any major matter going on) in GR. But here is one! Great work @jessimckenzi.bsky.social !
Just look at this beauty! 😍
August 15, 2025 at 10:18 AM
Just look at this beauty! 😍
Looks like a GC (Ground-to-Cloud or "inverse") lightning bolt, probably triggered by a CG (Cloud-to-Ground) nearby. Great capture!
Stunning photo of lightning striking the summit of the Aiguille du Midi (3842 m) yesterday evening! 🤩🌩️⚡️
📷 Katia Zubrówka 🙏
📷 Katia Zubrówka 🙏
August 15, 2025 at 10:01 AM
Looks like a GC (Ground-to-Cloud or "inverse") lightning bolt, probably triggered by a CG (Cloud-to-Ground) nearby. Great capture!
Perseids from Mauna Kea. Despite the (almost full) moon, there were some pretty nice meteors 🤩
Best Shooting Stars over Mauna Kea, Hawaii
As of 2025/08/12
Asahi Astro Live, Mauna Kea, Hawaii
Credit: Asahi Newspaper, National Astronomical Observatory of Japan
As of 2025/08/12
Asahi Astro Live, Mauna Kea, Hawaii
Credit: Asahi Newspaper, National Astronomical Observatory of Japan
Mauna Kea Meteor Watcher
YouTube
www.youtube.com
August 13, 2025 at 10:11 AM
Perseids from Mauna Kea. Despite the (almost full) moon, there were some pretty nice meteors 🤩