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.
Cassini WAC sequence of 18 frames taken December 29, 2000 spanning just over 2 hours. It shows Jupiter rotating with its Great Red Spot in view and Ganymede orbiting on the planet's far side. Distance: 9.86 million km Phase angle: 53 deg More details at flic.kr/p/acS6sY
Despite radiation and Trump's efforts to kill Juno, our only envoy around Jupiter, this plucky spacecraft still works and is taking images. Here are three examples taken by SRU camera during orbits 77 and 78, showing dark side of Jupiter and its auroras. Credit: NASA/Caltech-JPL/SwRI/D. Machacek.
I have added yet another global map of Jupiter to my website. The new map is an updated version of a map I originally created in 2002 (!). The new version is geometrically more accurate and the color is better. It's available here: bjj.mmedia.is/data/jupiter... A test render created using the map:
This Artemis II eclipse is giving me Clementine 1994 vibes with Venus in the background.
Webb and Hubble join forces to share the most comprehensive view of Saturn to date 🪐 Hubble reveals subtle colour variations across the planet, while Webb senses clouds and chemicals at many different depths in the atmosphere 👉 https://esawebb.org/news/weic2606/ 🔭 🧪
A cosmic first! 🚨 Hubble has spotted a comet that slowed and reversed its spin. Outgassing jets acted like thrusters, literally pushing it into a new rotation, shown here in this science visualization: https://news.stsci.edu/4c2u6hv
Here is my reprocessed version of the Juice NavCam images of comet 3I/Atlas taken last November shortly after it's closest approach to the sun. 🧪🔭 For this animation I removed the static noise and aligned the images to the nucleus. Credit: ESA/Juice/NavCam Processing: Simeon Schmauß CC-BY-SA
European Space Agency@esa.int · 5mo agoIn July 2025, interstellar object 3I/ATLAS entered our Solar System. ☄️ Our Jupiter Icy Moons Explorer – Juice – happened to be in the right place, with the right equipment, at the right time to see it. Here's the full story 👉 www.esa.int/Enabling_Sup... @science.esa.int @operations.esa.int 🧪🔭
Delighted to see our WISPIT team announce the second directly imaged exoplanet from the WISPIT 2 system! Led by Chloe Lawlor (Galway) with Richelle van Capelleveen (Leiden), we also have a spectrum of the inner, more massive planet, showing carbon monoxide features. ☄ #exoplanet #astrodon
NASA Earth Observatory image of the day Cañon Fiord’s Whirling Waters science.nasa.gov/earth/earth-... Credits: images by Lauren Dauphin, using Landsat data from the U.S. Geological Survey. 🧪🔭
Seasonally recurrent annular cyclone on Mars in processed images from newly released data from the EXI camera system onboard the Hope probe (EMM - Emirates Mars Mission). The images were taken on August 7, 2025 between ~12:30 and 18:10 UTC. Credit: Emirates Mars Mission (EMM)/EXI/D. Machacek.
(1/3) Another set of Jupiter test renders from the Voyager 2 map I'm working on. Here I used True Color Tools (TCT) to correct the color. This is a great set of tools by @askaniy.bsky.social to compute realistic colors (see github.com/Askaniy/True... )
🚀 10 years ago, our largest and most sophisticated martian explorer left Earth behind. To mark the launch anniversary, here are 5 remarkable things @esa.int's Trace Gas Orbiter (TGO) was made for 🧵👇
🧃 Juice update! 👩💻 Science teams are busy analysing the 3I/ATLAS data received from five Juice science instruments ☄️ They're also looking forward to a star occultation by Jupiter’s moon Kallichore on 18 March, which could refine its known position – valuable data for a possible 2031 flyby. 1/2 🔭🧪
(1/4) Jupiter test renders from Voyager 2 data. The left one is from a map I made years ago. The right one is from a new map I'm working on from the same data. The color is better and will be even better in the final version. But the biggest change is that the new map is geometrically more accurate.
Cool views of lunar highland mountains from Apollo 17. Zoom to examine and you can get a good feel for the hight and ruggedness of the terrain. flic.kr/p/2rX149C flic.kr/p/2rX2SFo
Pluto and Charon from the approaching New Horizons spacecraft on July 14, 2015.
'Sea Of Light' Some high quality stills from the short film. Source photography by Zena Cardman on ISS is repaired, remastered & retimed. The 4k UHD video with music by Jesse Gallagher can be viewed here... youtu.be/0Izl-XNE9ZY
1/n 2 NEW epic images of Phobos over Mars just released by @esa.int Mars Express This view is especially striking, with Phobos between the Tharsis volcanoes and Noctis Labyrinthus–Valles Marineris Full resolution 300MP(!) & info on: flic.kr/p/2rMW4so Credit: ESA/DLR/FUBerlin/AndreaLuck CC BY 🧪🔭
No new JunoCam images have appeared since July but there are many older, spectacular images I still haven't processed. I processed this one recently. This is from the PJ14_21 raw image data obtained on July 16, 2018. Approx true color/contrast and enhanced versions. North is to the upper left.
Martian moon Phobos from Mars Express' HRSC camera. A color composite of three images taken through ND, GRN, and BL filters. Largest crater with bright splotches is Stickney. North is up. Date: September 19, 2025. Credit: ESA\DLR\FU Berlin\D. Machacek.
3/3 If you’ve been following my work this won’t come as a surprise. I’ve once again updated the family portrait of the Solar System’s giant planets captured in near infrared by JWST Full size+info flic.kr/p/2oUkYSY 🧪🔭 I’ll keep updating it whenever an improved version of these giants is released🙂
Photorealistic animation of a Carboniferous scene from 320 million years ago featuring Lepidodendron at various stages of growth. Not AI. Created with Blender, Photoshop, & Premiere Pro. #carboniferous #lepidodendron #flora #prehistoric #artadventcalendar vimeo.com/1089774111?f...
Lepidodendron forest rain
Photorealistic animation of a Carboniferous scene from 320 million years ago featuring Lepidodendron at various stages of growth.. Also featured is Noeggerathia…
vimeo.com
Tried something new. I used WinJUPOS to de-rotate the #JWST #Saturn 🪐 images. Filters (F150W2, F164N) and F212N. Makes the storms and other features better visible.🔭 #astronomy Observation date: 2024-11-29
On this day back in 1995, the Galileo spacecraft performed its Jupiter orbit insertion burn. Due to problems with the tape recorder, no images were taken. However, these images showing the Great Red Spot were obtained on June 26, 1996 during the G1 orbit. The contrast and color has been exaggerated.
