Björn Jónsson
@bjorn_jons
Followers
4K
Following
695
Media
351
Statuses
963
Software engineer interested in solar system exploration + many other things. Advanced amateur planetary image processor. Ruler of several non-existent planets.
Iceland
Joined October 2014
Very happy to 'discover' that the @NASAJuno imagery is every bit as spectacular as Voyager/Cassini. Just a lot more challenging to process.
13
132
350
RT @tw__astro: #Mars, Phobos and Deimos last night under good conditions. A great view of Valles Marineris, with high altitude clouds (and….
0
125
0
RT @ESA_JUICE: 🆕Timelapse! Volume up, sit back and enjoy #ESAJuice's lunar-Earth flyby in all its glory 🤩
0
162
0
Image PJ64_44 obtained by @NASAJuno on Aug 18, 2024 in approximately true color/contrast and enhanced versions. North is up. The central north polar cyclone is visible above center at left.
1
7
28
RT @ESA_JUICE: 🆕 Earth and Moon pose for Juice’s scientific camera, JANUS! . Discover all images here 👉 https://t.c….
0
103
0
Images PJ63_18 and PJ63_37 obtained by @NASAJuno on July 16, 2024. Approximately true color/contrast and enhanced versions.
2
13
44
RT @BSteinbekk: How about some volcano twilight vibes from the ongoing eruption in Iceland!.Sharing is caring ❤️
0
455
0
Image PJ61_133 obtained by @NASAJuno on May 12, 2024. Approximately true color/contrast and enhanced versions. North is up.
0
3
9
An animation showing hows Io's specular highlights change with changing viewing geometry. The highlights are rendered using a preliminary illumination model - the specular reflections are based on the Phong illumination model.
0
8
20
0
67
0
A map-projected montage comparing an area on Io imaged by @NASAJuno on Dec 30, 2023 (left) and Feb 3, 2024 (right). In the Feb 2024 image, specular reflections are visible whereas no such reflections are visible in the Dec 30, 2023 image. The reason: Different viewing geometry.
9
43
204
Image PJ58_26 from @NASAJuno on Feb 3, 2024. The small, bright features are specular reflections from features that normally appear dark (volcanic glass?). A plume is visible at lower right, it's been brightened rel to other parts of the image & is heavily processed. North is up.
5
33
188
RT @tw__astro: After the recent article about Neptune & Uranus' colour, I had to check for myself. Here are the two, processed identically….
0
102
0
RT @DanielMachacek_: Twenty years ago mankind collected, for the first (and last) time, samples from a comet! On January 2, 2004, NASA's St….
0
5
0
Img PJ57_23 of Io from @NASAJuno on 2023-12-30. N is up. The nightside's brightness was increased to show details illuminated by Jupitershine. Loki is at lower right; it's the best view of it since Voyager 1 in 1979 (PJ57_22 is a higher res but far more oblique view than PJ57_23)
1
7
32
A quick and early version of image PJ57_22 of Io obtained yesterday (Dec 30, 2023) by @NASAJuno. North is up. The brightness of the nightside has been increased to show details illuminated by Jupitershine. The color is preliminary and probably not very far from Io's real color.
1
30
145
Image PJ56_132 obtained by @NASAJuno on Nov 22, 2023. Approximately true color/contrast (left) and an illumination-adjusted, contrast enhanced version (right). The color in these images (and other PJ56 images) is less accurate than in images from earlier perijoves.
2
8
38