Jörg Altheimer
@jaltheimer.bsky.social
Computer scientist and entrepreneur. Working on archeometallurgy. Physics and spaceflight is my passion though.
Mostly posting #Astrophotography stuff here.
Mostly posting #Astrophotography stuff here.
Pinned
Jörg Altheimer
@jaltheimer.bsky.social
· Aug 12
Not only where the nights extremely short like every summer, the weather also didn't want to play nice for #Astrophotography this year. Which means I wont get any more time on the targets I had selected this year. But I did get a few h on the Lagoon Nebula, despite it being insanely low in the sky.
The Veil nebula in Cygnus imaged with my Samyang 135mm F2 lens. A great #Astrophotography target for Summer and early Autumn. Despite its distance of ~2500 lightyears, this supernova remnant just fit into the frame. Total exposure time about 2 hours.
November 12, 2025 at 7:49 PM
The Veil nebula in Cygnus imaged with my Samyang 135mm F2 lens. A great #Astrophotography target for Summer and early Autumn. Despite its distance of ~2500 lightyears, this supernova remnant just fit into the frame. Total exposure time about 2 hours.
October 27, 2025 at 7:30 PM
Had a quick glimpse between the clouds on comet C/2025 A6 (Lemmon) in Canes Venatici well after sunset. Composite of around 3 minutes worth of 1 second untracked images.
#Astrophotography
#Astrophotography
October 19, 2025 at 4:54 PM
Had a quick glimpse between the clouds on comet C/2025 A6 (Lemmon) in Canes Venatici well after sunset. Composite of around 3 minutes worth of 1 second untracked images.
#Astrophotography
#Astrophotography
More mushrooms from a local forest. The damp weather really helps them grow very fast.
October 6, 2025 at 8:11 PM
More mushrooms from a local forest. The damp weather really helps them grow very fast.
As expected from this season, its cloudy and no stars in sight. But on the other hand mushroom season is in full swing.
October 6, 2025 at 6:47 PM
As expected from this season, its cloudy and no stars in sight. But on the other hand mushroom season is in full swing.
The Helix Nebula or Caldwell 63 is a planertary nebula in the constellation Aquarius. When it comes to planetary nebulas, it's apparent size is extremely large and its features and structures become visible even in mid sized telescopes. Making it a very interesting #Astrophotography target.
September 22, 2025 at 10:11 PM
The Helix Nebula or Caldwell 63 is a planertary nebula in the constellation Aquarius. When it comes to planetary nebulas, it's apparent size is extremely large and its features and structures become visible even in mid sized telescopes. Making it a very interesting #Astrophotography target.
Neptune and it's moon Triton(which might actually be a captured dwarf planet) in the early morning hours of 6th September.
10 second exposures at f27 where just enough to make Triton visible without resulting in trailing lights.
#Astrophotography
10 second exposures at f27 where just enough to make Triton visible without resulting in trailing lights.
#Astrophotography
September 10, 2025 at 8:20 PM
Neptune and it's moon Triton(which might actually be a captured dwarf planet) in the early morning hours of 6th September.
10 second exposures at f27 where just enough to make Triton visible without resulting in trailing lights.
#Astrophotography
10 second exposures at f27 where just enough to make Triton visible without resulting in trailing lights.
#Astrophotography
Besides the planets there is of course the Moon as a bright target. I tried to utilize the full width and length of an APS-C sensor by using a 2x telecentric barlow. The cropped in images should provide full resolution of some regions.
#Astrophotography
#Astrophotography
September 7, 2025 at 7:38 PM
Besides the planets there is of course the Moon as a bright target. I tried to utilize the full width and length of an APS-C sensor by using a 2x telecentric barlow. The cropped in images should provide full resolution of some regions.
#Astrophotography
#Astrophotography
While Deep Space has to take a back seat in #Astrophotography during the current Moon phase, I'm trying to squeeze out every last bit out of my Deep Space Rig for planetary imaging.
Here is Saturn through my 130mm Newton and Canon EOS 250d.
Here is Saturn through my 130mm Newton and Canon EOS 250d.
September 6, 2025 at 10:09 PM
While Deep Space has to take a back seat in #Astrophotography during the current Moon phase, I'm trying to squeeze out every last bit out of my Deep Space Rig for planetary imaging.
Here is Saturn through my 130mm Newton and Canon EOS 250d.
Here is Saturn through my 130mm Newton and Canon EOS 250d.
Not a typical #Astrophotography target, but I really really wanted to try and see if can at least capture a glimpse of the interstellar comet #3I/Atlas shortly after sundown and just before it vanished below the horizon. Challanging with a 130mm newton and a reg. DSLR but it might just have worked.
August 19, 2025 at 5:38 PM
Not a typical #Astrophotography target, but I really really wanted to try and see if can at least capture a glimpse of the interstellar comet #3I/Atlas shortly after sundown and just before it vanished below the horizon. Challanging with a 130mm newton and a reg. DSLR but it might just have worked.
Supernova SN 2025rbs in the galaxy NGC7331 from yesterdays short #Astrophotography session.
My personal first for a type 1a Supernova (The bright spot right next to the galactic nucleus).
My personal first for a type 1a Supernova (The bright spot right next to the galactic nucleus).
August 18, 2025 at 7:11 PM
Supernova SN 2025rbs in the galaxy NGC7331 from yesterdays short #Astrophotography session.
My personal first for a type 1a Supernova (The bright spot right next to the galactic nucleus).
My personal first for a type 1a Supernova (The bright spot right next to the galactic nucleus).
Reposted by Jörg Altheimer
As the Milky Way band appears to pour into our ELT, the cranes around it seem to do the same while they further advance the telescope 🏗️ 🔭
Once complete, the ELT will be breaking down the light above in unparalleled detail.
More: https://www.eso.org/public/images/potw2533a/ 🧪
📷 C. Letelier/ESO
Once complete, the ELT will be breaking down the light above in unparalleled detail.
More: https://www.eso.org/public/images/potw2533a/ 🧪
📷 C. Letelier/ESO
August 18, 2025 at 7:02 AM
As the Milky Way band appears to pour into our ELT, the cranes around it seem to do the same while they further advance the telescope 🏗️ 🔭
Once complete, the ELT will be breaking down the light above in unparalleled detail.
More: https://www.eso.org/public/images/potw2533a/ 🧪
📷 C. Letelier/ESO
Once complete, the ELT will be breaking down the light above in unparalleled detail.
More: https://www.eso.org/public/images/potw2533a/ 🧪
📷 C. Letelier/ESO
The second picture of this summers #Astrophotography targets.
The Trifid Nebula M20. As with M8 I didn't have nearly as much time as I wanted due to bad weather and short nights, but it is still quite a sight, even at relatively low exposure time.
The Trifid Nebula M20. As with M8 I didn't have nearly as much time as I wanted due to bad weather and short nights, but it is still quite a sight, even at relatively low exposure time.
August 16, 2025 at 7:57 PM
The second picture of this summers #Astrophotography targets.
The Trifid Nebula M20. As with M8 I didn't have nearly as much time as I wanted due to bad weather and short nights, but it is still quite a sight, even at relatively low exposure time.
The Trifid Nebula M20. As with M8 I didn't have nearly as much time as I wanted due to bad weather and short nights, but it is still quite a sight, even at relatively low exposure time.
Not only where the nights extremely short like every summer, the weather also didn't want to play nice for #Astrophotography this year. Which means I wont get any more time on the targets I had selected this year. But I did get a few h on the Lagoon Nebula, despite it being insanely low in the sky.
August 12, 2025 at 10:11 PM
Not only where the nights extremely short like every summer, the weather also didn't want to play nice for #Astrophotography this year. Which means I wont get any more time on the targets I had selected this year. But I did get a few h on the Lagoon Nebula, despite it being insanely low in the sky.
Reposted by Jörg Altheimer
Our VLT may have made intriguing discoveries in the surroundings of young stars:
➡️ A planet candidate inside a disc spiral (image 1)
➡️ A planet or brown dwarf candidate forming through gravitational instability (image 2)
https://www.eso.org/public/news/eso2513/
🔭 🧪
➡️ A planet candidate inside a disc spiral (image 1)
➡️ A planet or brown dwarf candidate forming through gravitational instability (image 2)
https://www.eso.org/public/news/eso2513/
🔭 🧪
July 21, 2025 at 12:03 PM
Our VLT may have made intriguing discoveries in the surroundings of young stars:
➡️ A planet candidate inside a disc spiral (image 1)
➡️ A planet or brown dwarf candidate forming through gravitational instability (image 2)
https://www.eso.org/public/news/eso2513/
🔭 🧪
➡️ A planet candidate inside a disc spiral (image 1)
➡️ A planet or brown dwarf candidate forming through gravitational instability (image 2)
https://www.eso.org/public/news/eso2513/
🔭 🧪
Reposted by Jörg Altheimer
Astronomers pinpointed the moment when planets began to form around a star.
🎬 Discover more with the latest episode of #ChasingStarlight ICYMI.
https://www.youtube.com/watch?v=0j-MH6_QlBA
Full story: https://www.eso.org/public/news/eso2512/
🔭 🧪
🎬 Discover more with the latest episode of #ChasingStarlight ICYMI.
https://www.youtube.com/watch?v=0j-MH6_QlBA
Full story: https://www.eso.org/public/news/eso2512/
🔭 🧪
July 17, 2025 at 9:26 AM
Astronomers pinpointed the moment when planets began to form around a star.
🎬 Discover more with the latest episode of #ChasingStarlight ICYMI.
https://www.youtube.com/watch?v=0j-MH6_QlBA
Full story: https://www.eso.org/public/news/eso2512/
🔭 🧪
🎬 Discover more with the latest episode of #ChasingStarlight ICYMI.
https://www.youtube.com/watch?v=0j-MH6_QlBA
Full story: https://www.eso.org/public/news/eso2512/
🔭 🧪
Reposted by Jörg Altheimer
🚨 Astronomers have witnessed the dawn of a new solar system!
They observed the first specks of planet-forming material — hot minerals beginning to solidify around HOPS-315, a baby star 1300 light-years away.
Read more: https://www.eso.org/public/news/eso2512/
🔭 🧪 ☄️ #planetsci
They observed the first specks of planet-forming material — hot minerals beginning to solidify around HOPS-315, a baby star 1300 light-years away.
Read more: https://www.eso.org/public/news/eso2512/
🔭 🧪 ☄️ #planetsci
July 16, 2025 at 3:03 PM
🚨 Astronomers have witnessed the dawn of a new solar system!
They observed the first specks of planet-forming material — hot minerals beginning to solidify around HOPS-315, a baby star 1300 light-years away.
Read more: https://www.eso.org/public/news/eso2512/
🔭 🧪 ☄️ #planetsci
They observed the first specks of planet-forming material — hot minerals beginning to solidify around HOPS-315, a baby star 1300 light-years away.
Read more: https://www.eso.org/public/news/eso2512/
🔭 🧪 ☄️ #planetsci
Reposted by Jörg Altheimer
🪩 Flashback: The heart of the galaxy NGC 1097 features a gaseous & dusty ring.
The bright spots in the ring are stellar nurseries, whereas the glowing centre hides a supermassive black hole that feeds off its surroundings.
More: https://www.eso.org/public/images/ann22015a/ 🔭
📷 ESO/ERIS team
The bright spots in the ring are stellar nurseries, whereas the glowing centre hides a supermassive black hole that feeds off its surroundings.
More: https://www.eso.org/public/images/ann22015a/ 🔭
📷 ESO/ERIS team
July 15, 2025 at 7:02 AM
🪩 Flashback: The heart of the galaxy NGC 1097 features a gaseous & dusty ring.
The bright spots in the ring are stellar nurseries, whereas the glowing centre hides a supermassive black hole that feeds off its surroundings.
More: https://www.eso.org/public/images/ann22015a/ 🔭
📷 ESO/ERIS team
The bright spots in the ring are stellar nurseries, whereas the glowing centre hides a supermassive black hole that feeds off its surroundings.
More: https://www.eso.org/public/images/ann22015a/ 🔭
📷 ESO/ERIS team
My favourite galaxy cluster for #Astrophotography by far is the Coma Cluster in the constellation Coma Berenices. It might not be as majestic as the Virgo cluster, but the sheer number of small galaxies in the FOV of a medium sized telescope is breathtaking. Imaged with my trusty Canon EOS 250d.
July 7, 2025 at 9:44 PM
My favourite galaxy cluster for #Astrophotography by far is the Coma Cluster in the constellation Coma Berenices. It might not be as majestic as the Virgo cluster, but the sheer number of small galaxies in the FOV of a medium sized telescope is breathtaking. Imaged with my trusty Canon EOS 250d.
Reposted by Jörg Altheimer
Prometheus fired up once again (and again) 😎🔥
Prometheus performed 4 consecutive ignitions on 20 June, a first in Europe for this type of engine.
The hot-firing campaign was held on the PF20 test bench at ArianeGroup’s site in Vernon, France.
Read more: www.esa.int/Enabling_Sup...
Prometheus performed 4 consecutive ignitions on 20 June, a first in Europe for this type of engine.
The hot-firing campaign was held on the PF20 test bench at ArianeGroup’s site in Vernon, France.
Read more: www.esa.int/Enabling_Sup...
July 2, 2025 at 12:19 PM
Prometheus fired up once again (and again) 😎🔥
Prometheus performed 4 consecutive ignitions on 20 June, a first in Europe for this type of engine.
The hot-firing campaign was held on the PF20 test bench at ArianeGroup’s site in Vernon, France.
Read more: www.esa.int/Enabling_Sup...
Prometheus performed 4 consecutive ignitions on 20 June, a first in Europe for this type of engine.
The hot-firing campaign was held on the PF20 test bench at ArianeGroup’s site in Vernon, France.
Read more: www.esa.int/Enabling_Sup...
Reposted by Jörg Altheimer
Read more: www.esa.int/Enabling_Sup...
Themis: the journey of Europe’s first reusable rocket has begun
www.esa.int
June 30, 2025 at 1:17 PM
Read more: www.esa.int/Enabling_Sup...
T Coronae Borealis still seems to behave.(Or misbehave depending how you view it). No obvious sign of a Nova as of an hour ago.
#Astrophotography
#TCrB
#Astrophotography
#TCrB
June 30, 2025 at 1:10 AM
T Coronae Borealis still seems to behave.(Or misbehave depending how you view it). No obvious sign of a Nova as of an hour ago.
#Astrophotography
#TCrB
#Astrophotography
#TCrB
Every now and then, I'm going after asteroids during #Astrophotography sessions.
Orange was the position of (2)Pallas in the early hours of 28th June. Green is the position in the early hours of 29th. (different cameras on my telescope, so image scale is slightly different).
Orange was the position of (2)Pallas in the early hours of 28th June. Green is the position in the early hours of 29th. (different cameras on my telescope, so image scale is slightly different).
June 29, 2025 at 5:25 PM
Every now and then, I'm going after asteroids during #Astrophotography sessions.
Orange was the position of (2)Pallas in the early hours of 28th June. Green is the position in the early hours of 29th. (different cameras on my telescope, so image scale is slightly different).
Orange was the position of (2)Pallas in the early hours of 28th June. Green is the position in the early hours of 29th. (different cameras on my telescope, so image scale is slightly different).
Reposted by Jörg Altheimer
Exceptional convoy! 🛻🚀 Europe's first reusable rocket stage demonstrator #Themis is all wrapped up and ready to roll from its integration hall in France to launch pad in Sweden. Bon voyage!
www.esa.int/themis
www.esa.int/themis
June 20, 2025 at 2:18 PM
Exceptional convoy! 🛻🚀 Europe's first reusable rocket stage demonstrator #Themis is all wrapped up and ready to roll from its integration hall in France to launch pad in Sweden. Bon voyage!
www.esa.int/themis
www.esa.int/themis