Björn Jónsson
@bjornjonsson.bsky.social
Software engineer interested in solar system exploration + many other things. Advanced amateur planetary image processor. Ruler of several non-existent planets.
Reposted by Björn Jónsson
Moving clouds slowly reveal sea ice twisting and turning hypnotically off the east coast of Greenland.
November 5, 2025 at 6:37 PM
Moving clouds slowly reveal sea ice twisting and turning hypnotically off the east coast of Greenland.
Reposted by Björn Jónsson
Fresh JWST view of Uranus taken Oct 6 2025 with NIRCam.
Full size & more info: flic.kr/p/2rByidu 🔭🧪
Credit: NASA/ESA/CSA/STScI/Andrea Luck CC BY
Proposal PI: Varun Bajaj
Proposal ID: 8975
Filters: F150W2-F162M, F410M
Full size & more info: flic.kr/p/2rByidu 🔭🧪
Credit: NASA/ESA/CSA/STScI/Andrea Luck CC BY
Proposal PI: Varun Bajaj
Proposal ID: 8975
Filters: F150W2-F162M, F410M
October 26, 2025 at 2:04 PM
Fresh JWST view of Uranus taken Oct 6 2025 with NIRCam.
Full size & more info: flic.kr/p/2rByidu 🔭🧪
Credit: NASA/ESA/CSA/STScI/Andrea Luck CC BY
Proposal PI: Varun Bajaj
Proposal ID: 8975
Filters: F150W2-F162M, F410M
Full size & more info: flic.kr/p/2rByidu 🔭🧪
Credit: NASA/ESA/CSA/STScI/Andrea Luck CC BY
Proposal PI: Varun Bajaj
Proposal ID: 8975
Filters: F150W2-F162M, F410M
Reposted by Björn Jónsson
Alrighty, ready to see something really cool? (and maybe a little nauseating)
The evolution of Hurricane Melissa's mesovortices at peak strength.
The evolution of Hurricane Melissa's mesovortices at peak strength.
October 29, 2025 at 8:10 PM
Alrighty, ready to see something really cool? (and maybe a little nauseating)
The evolution of Hurricane Melissa's mesovortices at peak strength.
The evolution of Hurricane Melissa's mesovortices at peak strength.
Reposted by Björn Jónsson
1/3 You might’ve seen last week’s newly released JWST data of Planetary Nebula NGC2440, here’s my take on it 😵
Full size 4K image and more info in this thread 🧵 🔭🧪
Credit: NASA/ESA/CSA/STScI/j. Roger/Andrea Luck CC BY
Full size 4K image and more info in this thread 🧵 🔭🧪
Credit: NASA/ESA/CSA/STScI/j. Roger/Andrea Luck CC BY
November 1, 2025 at 2:04 PM
1/3 You might’ve seen last week’s newly released JWST data of Planetary Nebula NGC2440, here’s my take on it 😵
Full size 4K image and more info in this thread 🧵 🔭🧪
Credit: NASA/ESA/CSA/STScI/j. Roger/Andrea Luck CC BY
Full size 4K image and more info in this thread 🧵 🔭🧪
Credit: NASA/ESA/CSA/STScI/j. Roger/Andrea Luck CC BY
Reposted by Björn Jónsson
CASSINI #SATURN MISSION
Planet: #Saturn
Start time: 2013-05-08
Instr.: #UVIS
Activity name: AURSTARE
t.me/landru79/838
NASA/JPL/j. ROGER
Planet: #Saturn
Start time: 2013-05-08
Instr.: #UVIS
Activity name: AURSTARE
t.me/landru79/838
NASA/JPL/j. ROGER
November 3, 2025 at 6:48 PM
CASSINI #SATURN MISSION
Planet: #Saturn
Start time: 2013-05-08
Instr.: #UVIS
Activity name: AURSTARE
t.me/landru79/838
NASA/JPL/j. ROGER
Planet: #Saturn
Start time: 2013-05-08
Instr.: #UVIS
Activity name: AURSTARE
t.me/landru79/838
NASA/JPL/j. ROGER
Reposted by Björn Jónsson
Another closeup of Saturn from Voyager 2 on August 21, 1981. This one shows a closer view of one of an eddy.
November 1, 2025 at 11:34 PM
Another closeup of Saturn from Voyager 2 on August 21, 1981. This one shows a closer view of one of an eddy.
Reposted by Björn Jónsson
Planet #Uranus 🪐 and inner moons with #JWST NIRCam 🔭 #planetsci Observation from this Monday (lol moon🌕day).
Filters: F150W2; F162M
Date: 2025-10-06 between 02:15:43 UT and 04:46:47 UT
Program: www.stsci.edu/jwst-program...
Filters: F150W2; F162M
Date: 2025-10-06 between 02:15:43 UT and 04:46:47 UT
Program: www.stsci.edu/jwst-program...
October 9, 2025 at 1:18 PM
Planet #Uranus 🪐 and inner moons with #JWST NIRCam 🔭 #planetsci Observation from this Monday (lol moon🌕day).
Filters: F150W2; F162M
Date: 2025-10-06 between 02:15:43 UT and 04:46:47 UT
Program: www.stsci.edu/jwst-program...
Filters: F150W2; F162M
Date: 2025-10-06 between 02:15:43 UT and 04:46:47 UT
Program: www.stsci.edu/jwst-program...
Reposted by Björn Jónsson
A distant shot of Saturn's system while Cassini was still was on its way. This was taken after they had resolved the condensation residue issue on the ISSNA optics by heating it, and still almost 2 years before Saturn arrival. Magnified 2x from original pixel scale.
Taken on 2002-10-21 14:43 UTC
Taken on 2002-10-21 14:43 UTC
September 20, 2025 at 1:25 PM
A distant shot of Saturn's system while Cassini was still was on its way. This was taken after they had resolved the condensation residue issue on the ISSNA optics by heating it, and still almost 2 years before Saturn arrival. Magnified 2x from original pixel scale.
Taken on 2002-10-21 14:43 UTC
Taken on 2002-10-21 14:43 UTC
Reposted by Björn Jónsson
A more distant shot of Io, moon of Jupiter, showing Loki Patera, the dark feature in the upper center, from Juno as it receded from Io on December 30th, 2023.
September 18, 2025 at 10:11 PM
A more distant shot of Io, moon of Jupiter, showing Loki Patera, the dark feature in the upper center, from Juno as it receded from Io on December 30th, 2023.
Reposted by Björn Jónsson
A few selected images of Mars processed from a new batch of data from the EXI camera aboard the Hope probe.
The dates and times of the images and some details are in the ALT text.
The dates and times of the images and some details are in the ALT text.
September 14, 2025 at 3:01 AM
A few selected images of Mars processed from a new batch of data from the EXI camera aboard the Hope probe.
The dates and times of the images and some details are in the ALT text.
The dates and times of the images and some details are in the ALT text.
I recently improved the color of my Voyager 1 map of Jupiter that I created in 2022. The main improvement is better synthetic green data (the original data doesn't include green).
Below are small previews of the old and new version of the map. The map is available here: bjj.mmedia.is/data/jupiter...
Below are small previews of the old and new version of the map. The map is available here: bjj.mmedia.is/data/jupiter...
September 15, 2025 at 6:47 PM
I recently improved the color of my Voyager 1 map of Jupiter that I created in 2022. The main improvement is better synthetic green data (the original data doesn't include green).
Below are small previews of the old and new version of the map. The map is available here: bjj.mmedia.is/data/jupiter...
Below are small previews of the old and new version of the map. The map is available here: bjj.mmedia.is/data/jupiter...
Reposted by Björn Jónsson
The sun was just 10 degrees above the horizon when NASA's Perseverance rover captured this morning view of Nili Planum yesterday. The rim of Jezero crater is casting a long shadow over the rover and foreground landscape. 🔭
Full res: flic.kr/p/2rt54pJ
Credit: NASA/JPL-Caltech/Simeon Schmauß
Full res: flic.kr/p/2rt54pJ
Credit: NASA/JPL-Caltech/Simeon Schmauß
September 13, 2025 at 9:54 PM
The sun was just 10 degrees above the horizon when NASA's Perseverance rover captured this morning view of Nili Planum yesterday. The rim of Jezero crater is casting a long shadow over the rover and foreground landscape. 🔭
Full res: flic.kr/p/2rt54pJ
Credit: NASA/JPL-Caltech/Simeon Schmauß
Full res: flic.kr/p/2rt54pJ
Credit: NASA/JPL-Caltech/Simeon Schmauß
(1/4) Test renders of Jupiter using my Voyager 1 global map (first image) and a version of the map with improved color (second image). Versions with and without enhanced contrast/colors are shown. The raw source data consists of orange and violet filtered images only.
September 3, 2025 at 9:20 PM
(1/4) Test renders of Jupiter using my Voyager 1 global map (first image) and a version of the map with improved color (second image). Versions with and without enhanced contrast/colors are shown. The raw source data consists of orange and violet filtered images only.
Reposted by Björn Jónsson
NASA released some shape models of four of Saturn's moons. These have every lump and bump; they're not simple spheres.
Here's a test render I did in #Blender showing #Mimas in false color - red is high, blue low. Clearly shows how non-spherical it is!
#sciart #spaceart
1/2
Here's a test render I did in #Blender showing #Mimas in false color - red is high, blue low. Clearly shows how non-spherical it is!
#sciart #spaceart
1/2
September 3, 2025 at 1:20 PM
Reposted by Björn Jónsson
#Hubble 🛰️🔭 images of #Saturn from yesterday, a 🧵
From proposal 17843 (PI: Amy Simon) archive.stsci.edu/proposal_sea...
First image with Filters F225W, F467M, F763M Observing start Time 20:24:08 to 20:28:15
From proposal 17843 (PI: Amy Simon) archive.stsci.edu/proposal_sea...
First image with Filters F225W, F467M, F763M Observing start Time 20:24:08 to 20:28:15
August 30, 2025 at 8:44 AM
#Hubble 🛰️🔭 images of #Saturn from yesterday, a 🧵
From proposal 17843 (PI: Amy Simon) archive.stsci.edu/proposal_sea...
First image with Filters F225W, F467M, F763M Observing start Time 20:24:08 to 20:28:15
From proposal 17843 (PI: Amy Simon) archive.stsci.edu/proposal_sea...
First image with Filters F225W, F467M, F763M Observing start Time 20:24:08 to 20:28:15
Reposted by Björn Jónsson
Today in 1979, Pioneer 11 was speeding away from Saturn, giving humanity a perspective from beyond the planet that it had never have. However, Saturn was also close to solar conjunction, which led to it being increasingly hard to transmit data. The right hand version shows how bad the dropouts were.
September 2, 2025 at 10:45 AM
Today in 1979, Pioneer 11 was speeding away from Saturn, giving humanity a perspective from beyond the planet that it had never have. However, Saturn was also close to solar conjunction, which led to it being increasingly hard to transmit data. The right hand version shows how bad the dropouts were.
Reposted by Björn Jónsson
Today in 1979, Pioneer 11 passed Saturn, viewing the night side of the rings, giving humanity its first encounter with the planet and its moons. It would be followed by Voyager 1 in 1980 and Voyager 2 in 1981.
September 1, 2025 at 11:26 PM
Today in 1979, Pioneer 11 passed Saturn, viewing the night side of the rings, giving humanity its first encounter with the planet and its moons. It would be followed by Voyager 1 in 1980 and Voyager 2 in 1981.
Reposted by Björn Jónsson
OTD 1989, Voyager 2 was speeding off into space after passing by Neptune. It couldn't take motion compensated pictures during departure because it didn't have enough memory to store the commands. That's why there aren't spectacular closeups of Triton on the way out (the closeup here is underexposed)
August 26, 2025 at 9:47 PM
OTD 1989, Voyager 2 was speeding off into space after passing by Neptune. It couldn't take motion compensated pictures during departure because it didn't have enough memory to store the commands. That's why there aren't spectacular closeups of Triton on the way out (the closeup here is underexposed)
I recently finished a Voyager 2 map of Jupiter using orange, green and violet images obtained at a range of ~10 million km. It's of higher quality than my old Voyager 2 map, even though the resolution is a bit lower. Here is a small 'preview' image showing the map.
bjj.mmedia.is/data/jupiter...
bjj.mmedia.is/data/jupiter...
August 12, 2025 at 2:40 PM
I recently finished a Voyager 2 map of Jupiter using orange, green and violet images obtained at a range of ~10 million km. It's of higher quality than my old Voyager 2 map, even though the resolution is a bit lower. Here is a small 'preview' image showing the map.
bjj.mmedia.is/data/jupiter...
bjj.mmedia.is/data/jupiter...
Reposted by Björn Jónsson
The REASON Ice Penetrating Radar produced good test data when we flew by Mars! All looking good for seeing inside #Europa in a few years. www.nasa.gov/missions/eur...
NASA’s Europa Clipper Radar Instrument Proves Itself at Mars - NASA
The agency’s largest interplanetary probe tested its radar during a Mars flyby. The results include a detailed image and bode well for the mission at
www.nasa.gov
August 1, 2025 at 8:00 PM
The REASON Ice Penetrating Radar produced good test data when we flew by Mars! All looking good for seeing inside #Europa in a few years. www.nasa.gov/missions/eur...
A rotation movie of Jupiter created using a global map of Jupiter I recently finished. The map is created from 135 Voyager 2 images from June 28, 1979. Two rotations are shown. In rotation 1, approx true color/contrast are used. Rotation 2 has exaggerated colors/contrast.
vimeo.com/1106162554?s...
vimeo.com/1106162554?s...
Jupiter rotation movie (Voyager 2)
A computer generated rotation movie of Jupiter. It is rendered using a new high resolution global map of Jupiter I recently finished. The map is created from 135…
vimeo.com
July 31, 2025 at 7:46 PM
A rotation movie of Jupiter created using a global map of Jupiter I recently finished. The map is created from 135 Voyager 2 images from June 28, 1979. Two rotations are shown. In rotation 1, approx true color/contrast are used. Rotation 2 has exaggerated colors/contrast.
vimeo.com/1106162554?s...
vimeo.com/1106162554?s...
Reposted by Björn Jónsson
Dos patatas a la vista
#MARS EXPRESS
TARGET = #DEIMOS #PHOBOS
TIME =2025-03-15 T 18:50:05.712 >> 18:50:19.337
ORBIT = 26762
HIGH RESOLUTION STEREO CAMERA #HRSC
CENTER_FILTER_WAVELENGTH = 600.0
EXPOSURE_DURATION = 33.768
psa.esa.int/psa/#/pages/...
ESA/j. Roger
#MARS EXPRESS
TARGET = #DEIMOS #PHOBOS
TIME =2025-03-15 T 18:50:05.712 >> 18:50:19.337
ORBIT = 26762
HIGH RESOLUTION STEREO CAMERA #HRSC
CENTER_FILTER_WAVELENGTH = 600.0
EXPOSURE_DURATION = 33.768
psa.esa.int/psa/#/pages/...
ESA/j. Roger
July 18, 2025 at 6:29 PM
Dos patatas a la vista
#MARS EXPRESS
TARGET = #DEIMOS #PHOBOS
TIME =2025-03-15 T 18:50:05.712 >> 18:50:19.337
ORBIT = 26762
HIGH RESOLUTION STEREO CAMERA #HRSC
CENTER_FILTER_WAVELENGTH = 600.0
EXPOSURE_DURATION = 33.768
psa.esa.int/psa/#/pages/...
ESA/j. Roger
#MARS EXPRESS
TARGET = #DEIMOS #PHOBOS
TIME =2025-03-15 T 18:50:05.712 >> 18:50:19.337
ORBIT = 26762
HIGH RESOLUTION STEREO CAMERA #HRSC
CENTER_FILTER_WAVELENGTH = 600.0
EXPOSURE_DURATION = 33.768
psa.esa.int/psa/#/pages/...
ESA/j. Roger
Reposted by Björn Jónsson
The delicate translucency of Saturn’s rings. Images taken by Cassini between 2006 and 2009.
flic.kr/p/2qAQbba
flic.kr/p/2qB25Kt
flic.kr/p/2qANpJg
flic.kr/p/2qAQbba
flic.kr/p/2qB25Kt
flic.kr/p/2qANpJg
July 18, 2025 at 9:04 PM
The delicate translucency of Saturn’s rings. Images taken by Cassini between 2006 and 2009.
flic.kr/p/2qAQbba
flic.kr/p/2qB25Kt
flic.kr/p/2qANpJg
flic.kr/p/2qAQbba
flic.kr/p/2qB25Kt
flic.kr/p/2qANpJg
Reposted by Björn Jónsson
Animated gif of Juno/JIRAM 3.5-micron observations of Io from December 27, 2024. This gif covers roughly 45 minutes of time as Juno passed Io at a distance of 74,444 km. The eruption at West Illyrikon was so intense that it saturated the detector and caused internal reflections within JIRAM's optics
July 18, 2025 at 5:27 PM
Animated gif of Juno/JIRAM 3.5-micron observations of Io from December 27, 2024. This gif covers roughly 45 minutes of time as Juno passed Io at a distance of 74,444 km. The eruption at West Illyrikon was so intense that it saturated the detector and caused internal reflections within JIRAM's optics
Reposted by Björn Jónsson
The Curiosity rover is sending back some jaw-droppingly gorgeous views from Mars right now... Well done everyone on the camera teams|! Just look at this glorious detail and lighting...! Images: NASA/JPL-Caltech/MSSS/fredk/S Atkinson
June 12, 2025 at 4:36 PM
The Curiosity rover is sending back some jaw-droppingly gorgeous views from Mars right now... Well done everyone on the camera teams|! Just look at this glorious detail and lighting...! Images: NASA/JPL-Caltech/MSSS/fredk/S Atkinson